Lily: Half the length of the relationship
Marshall: One week for every month you were together
Robin: Exactly 10,000 drinks. However long that takes
Barney: You can't measure something like this in time. There's a series of steps. From her bed to the front door. Bam! Out of there. Next!
But I think you start to recover the moment you meet that person who gets you back in the game.
however, thank you Mr. Impossible for getting me back in the game again,, haha