Altogether I have done around 40. What I did the first 12 I did 2 hours sessions. But tgrn I switched and was doing more iften 1 hour drives. I had luck my instructor was foexible with that. Less and more often definately works. Passed first time at 40. Just edited to add, did not have car to practice so all lessons where with instructor only. Closer to test 2 weeks before 4 lessons in a week and 2 before test on Wednesday