How many months does it take to finish an AS level subject?Watch
It's hard to tell you how long it would take because it really depends on how fast you revise and how often. It's theoretically possible to cover the whole syllabus for an AS subject in about two months, for one subject, anyway. Much longer if you're doing four essay-based subjects, though.
I would say with memory-based subjects that you're never really fully finished revising them, haha