i would say a quite a few... getting pulled over is part of owning the car. Some poeple get lucky and never get pulled over, and others get pulled over several times a week. A lot depends on how outrageous the car looks, where you drive it and especially how you drive it.
I think they changed the laws for p plates since i was on P's... it used to be just a $100 fine for exceeding the power to wieght rule, but it might have changed now.
Problem is P plates only get 5 points to play with, so if you stuff up at all, you're in trouble. Get two unroadworthy fines and that's it... licence gone
But its your call on whether or not your up for playing cat n mouse with the fuzz for the next couple years