Late night is also a time rich with anxiety. It is the time with the highest rate of searches that include the word “symptoms,” a worrisome category that captures searches for heart attacks, colon cancer, H.I.V., A.L.S., strokes, brain tumors and many other conditions.

One very important weakness in this data: Google releases only search rates, not the total number of searches. If a search rate for a word is highest at 3 a.m., it means that of all the searches at that time, an unusually large percentage of them include that word. Another important weakness of the data: Our searches most definitely do not capture every activity. If you have a regular yoga appointment at noon, you may not need to make any searches about it.

“Porn,” which is three times more popular among men than women, is most popular from midnight to 2 a.m. “Literotica,” which appeals primarily to women, has a substantial early-morning presence as well (it is most popular from 3 to 5 a.m.). Search rates for “vibrators” are highest at about 4 a.m. Search rates related to condoms, such as “how to put on a condom,” peak at 10:28 p.m.

The question “why is my poop green?” is asked most between 5 and 6 a.m. and between 6 and 7 p.m.

There is some evidence that we get less sharp as the day progresses. Between 2 and 3 a.m., search rates for “forgot password” are 60 percent higher than average. They are lowest around 9 a.m. Between 2 and 3 a.m., we are more than twice as likely to misspell “facebook” as “facbook” and nearly twice as likely to misspell “weather” as “wether.”

While my main analysis used New York data, I did briefly test search patterns in other areas. Mostly, people in different parts of the United States and the world are very similar in how we search. For example, every part of the world I looked at consumes more news first thing in the morning than at any other time of the day.