On Memory and Repetative Behavior Behavior

I was hanging out with Dean last night when his girlfriend called. I hear this:

"The clue you give me is, 'The Time I Fell Asleep?!' Do you know me? How often do I fall asleep??"

Well, every night, usually.

"How long have we been dating? Three years! Okay? So there are 365 days in a year … plus I fall asleep a lot more than once a day … 1400? 1500 times??"

Math. This was getting difficult.

"Oh, wait, I figured it out. I know which time you mean. Yeah."

He turned to me when he got off the phone. "You know what she said that made me remember? 'It was recently.'"