I was not very good at following a rigid schedule for my snakes. I would put the male in with the female and then wait until I saw a lock and a release. I then seperated them.
I would say that I paired my snakes 7 or 8 times (with visual locks) and that's all. Out of one clutch of 7 eggs I got 3 BEL's! Another clutch of 9 eggs yielded 4 bumblee bees!
I sure can't complain!