A fighter's training camp varies in length, ranging anywhere between eight and 12 weeks to prepare for an upcoming foe and to get your body right.

But Amanda Nunes’ training camp for her upcoming championship fight against Ronda Rousey — which is set to headline UFC 207 on Dec. 30, 2016 in Las Vegas, Nevada — will have gone on for a staggering three years.

That’s because "Leoa" recently told MMAmania.com correspondent and Combate Americas atomweight Nicdali Rivera-Calanoc that she has been preparing and getting her game right for an eventual showdown against "Rowdy" — who was the longtime ruler of the women’s bantamweight division — since making her Octagon debut in 2013.

She also explains how big of a moment their first-ever staredown was (video here) when they came face-to-face at last weekend’s UFC 205 weigh in event:

"I didn’t really think anything. I wanted to see her face when it gets real. And that was the moment, it was a big moment for me. I am very confident and I know I am going to take this fight. And that moment was amazing. I don’t know how to explain it. Ever since I got into the UFC, I always thought about that fight. Even if I have another opponent, after I finished that fight, I trained for Ronda Rousey. At the time she was the champion; now I’m the champion and she’s the challenger. How crazy is this? Ronda is really tough. But I know if I put my game, I will take this fight. We know everything Ronda brings. I know everything. I have a breakdown of Rousey I watch everyday. I know everything she does good and bad. I will take this fight."

While the face off was a big moment for the Brazilian champion, it didn’t seem to mean that much for Rousey, as she immediately stormed off the stage, much to the chagrin of many fans in attendance.

You can thank this "screw up" for that.

Nunes has been on a hot streak as of late, winning four in a row including her first-round submission win over Miesha Tate at UFC 200 to capture her first-ever world title. As for Rousey, she hasn’t stepped foot inside the cage in over 15 months following her own knockout loss to Holly Holm.

Furthermore, her showdown against Nunes will be "Rowdy's" first in her last seven contests where she’ll be going in as a challenger and not the champion.

For more on that title fight and the rest of the UF 207 pay-per-view (PPV) event click here and here.