Don't know, Fed has never defined repeatedly that I know of. I'd venture they expect it to be called very conservatively. I can think of numerous times I have called consecutive encroachments, particularly on a try, and we've never invoked the repeatedly cause. In fact K normally declines the penalty on a try anyway.
I brought this point up earlier in the thread. Its probably extreme but I can see DPI being committed on every pass play in a goal to go situation. I would imagine the repeatedly scenario would be invoked after the ball could no longer be moved for penalty enforcement, which is strictly my own opinion.
It would boil down a game of chicken between A and B's head coaches. At some point A is probably going to flinch and call a run play.
I forsee the AFD coming back very, very soon.