The most reasonable way to answer it is to assess your available time. The actual length of time will, of course, depend upon the individual student's background in the area. Once you know how much time you can spend per week on your graduate study, you can decide how long you want to take to complete the entire programme. Even the most leisurely approach should allow you to study one course at a time and complete two examinations per year. However, most students want to complete their programmes in less than five years.
Many students work on two courses at a time.
If you have more time available, you may wish to take three. Be sure, when choosing the order in which you plan to study your courses, that you consult the examination schedule .