It is completely up to you and how much time you have to study. There is no end date for you course or deadlines for each module. Therefore, you can study at a pace that suits you. If you are taking the course full time with no other commitments you could complete the course in as little as 1-3 weeks. Or if you are working full time it might take you up to a year.
The average students takes around one month to 6 weeks to complete the course.