Steph Solis, and Josh Hafner

USA TODAY

Clarifications & Corrections: An earlier version of this article misidentified man who asked the candidates to "name one positive thing" about one another. His name is Karl Becker.

Russia came up 37 times during Sunday's debate, but the phrase of the night was "locker room talk."

Donald Trump said it five times during the debate to explain the comments he made about groping women in a 2005 video with former Access Hollywood host Billy Bush. The GOP nominee's answer, already under scrutiny in the days following his apology, generated buzz online during the second presidential debate.

Hillary Clinton and Trump spat over Obamacare, tax reform and the Syrian conflict during the debate at Washington University in St. Louis, Mo., but they also attacked each other's character. Here are some of those big moments.

Analysis: She called him a misogynist. He said she should go to jail.

1. The first thing Trump says about the tape? It's "locker room talk."

Early on in the debate, moderator Anderson Cooper brought up the 2005 tape in which Trump described kissing women and grabbing their genitals without their consent.

“That is sexual assault. You brag that you have sexually assaulted women,” Cooper said. “Do you understand that?”

Trump dismissed his boasts as “locker room talk."

Column: I've never heard Donald Trump's 'locker room talk'

“I don't think you understood what was said. This was locker room talk,” Trump said. “I'm not proud of it. I apologized to my family. I apologized to the American people. Certainly, I'm not proud of it, but this is locker room talk.”

He repeated it when moderator Martha Raddatz questioned his claim that he is a different man than the one who spoke the 2005 tape. Trump didn't clarify, but he said, "I'm not proud of it."

2. Trump said he has "respect for women" at least five times.

"I have great respect for women. Nobody has more respect for women than I do."

That became Trump's refrain when Cooper asked him whether he had sexually assaulted women as he claimed to have done in the 2005 tape.

In the video, Trump talks about kissing beautiful women when he sees them with Bush. "I don't even wait," he said. "When you're a star, they let you do it. You can do anything — grab them by the p----."

Things got ugly — and then uglier: Top takeaways from Clinton-Trump II

3. How many times did Trump bring up Bill Clinton?

Trump also mentioned Bill Clinton when pressed about the 2005 tape. He said his comments were "just talk," while the president's transgressions were actions.

"So you could say it any way you want to say it, but Bill Clinton was abusive to women," Trump said, "Hillary Clinton attacked those same women and attacked them viciously."

Ninety minutes before the debate, Trump hosted a Facebook Live video with three of Clinton's most prominent accusers.

“Mr. Trump may have said some bad words, but Bill Clinton raped me, and Hillary Clinton threatened me," said Juanita Broaddrick, who says Bill Clinton raped her in the 1970s. "I don’t think there’s any comparison."

Trump's approach was different from last time when he hinted at issues within Clinton's family but praised himself for not bringing them up.

4. Wikileaks came up four times.

Trump mentioned Wikileaks twice, while moderator Martha Raddatz and Clinton each said it once.

Citing a question out of Virginia, Raddatz asked Clinton about Wikileaks' release of reported excerpts from paid speeches she gave to Wall Street executives: "Is it OK for politicians to be two-faced? Is it acceptable for a politician to have a private stance on the issues?"

Clinton said the quote was referring back to former President Lincoln's style of leadership while working with Congress. Then she tried to shift focus to the allegations that the Kremlin is behind the alleged hacks from Wikileaks.

5. How many interruptions were there?

Trump interrupted Clinton so many times that moderator Anderson Cooper called out the GOP nominee: "Please allow her to respond. She didn’t interrupt you."

Clinton later interrupted Trump when he blamed her for Obama's decision not to retaliate against Syrian President Bashar al-Assad's use of chemical warfare (he stopped short of doing so, asking Congress to authorize such operations).

"No, I wasn’t. I was gone," Clinton said. "I hate to interrupt you but at some point, we need to do some fact checking."

Vox reports Trump interrupted Clinton a total of 18 times, and she interrupted him once.

6. The one question that stunned both candidates.

Clinton and Trump faced nearly two dozen questions, but one question caught both candidates off guard.

"Would either of you name one positive thing that you respect in one another?" asked Karl Becker, an audience participant.

Cue laughter from the audience.

In one of the most awkward moments of the debate, Clinton complimented his children, and Trump said he admired Clinton's persistence.

"She doesn't quit. She doesn't give up. I respect that," Trump said. "I tell it like it is. She's a fighter."

Yet the real winner of the night may have been Kenneth Bone, the red-sweatered audience member who asked how each candidate would meet the nation's energy needs. He became an internet sensation.

7. The one question that didn't come up? #BlackLivesMatter.

This year, stories of unarmed black men being shot dead by police have dominated headlines, as have stories of officers being killed in the line of duty. The tensions between police and black communities across the country are visible, as noted in the Black Lives Matter movement, but there was no mention of it during the debate.

"I'm disappointed that the candidates weren't asked about policing and #BlackLivesMatter," Antonio French, a city alderman in Ferguson running for mayor, tweeted. "Very important to our country and our city."

The candidates only mentioned African Americans when they attacked each other. Clinton said African Americans were among several minority groups Trump unfairly targeted during his campaign.

Trump mentioned African Americans when he said, "Hillary's constantly talking about the inner cities of our country, which are a disaster education-wise, job-wise, safety-wise. In every way possible. I'm going to help the African-Americans. I’m going to help the Latinos, Hispanics. I am going to help the inner cities. She has done a terrible job for the African Americans."

Twitter weighed in on Trump references of "the African Americans," which became a trending topic.

8. These were the top five debate-related searches on Google

People have turned to Google for information about the Trump-Clinton debates more than they did in 2012 and 2008, according to Google trends.

Here are the top five debate-related searches:

1. Carried Interest

2. Aleppo (Here's a look at the situation in Aleppo, Syria)

3. Sidney Blumenthal (Factcheck.org looked at Trump's claims about Blumenthal in the first debate)

4. Who is winning the debate? (Take our Twitter poll.)

5. Bigly