Hello there

As I can see that you haven't mentioned about the examination which you're about to give and of which you're about to prepare so we can't provide you the exact details as the answer totally depends upon the type of examination as some takes more time and some less. But generally if I tell you then you should firstly try to know the exam patterns and try to understand what the examination asks in a candidate who are giving the examination and according to that you should make your plan that those things are in yourself or not and how you can develop that.

I hope it helps you!

Good luck!