The training manual has 8 training sessions. Then the checkride. Then the loft. Sim 0 is not required, but they've been doing it as an introduction to the sim. It is pretty standard to give 2 additional training sessions to those that need it prior to the PC. Beyond that, it's up to management.

Personally, I think anyone needing training beyond the 8-10 sessions should be let go except in extenuating circumstances. The extra session or two is meant for a student to polish things up if needed. On occasion, there have been those allowed to have 12 or more sessions (a little ridiculous in my opinion) to try to push them through. But it is not the norm.