This is a very subjective question. It depends on a candidates education, experience and aptitude. 

In a nutshell, most students would need to follow the guidance IFT provides in our advice/Strategy Blogs.

You need to follow the advice to the letter, like a recipe. If you do that, your chances of exam success are higher.

You have to figure out how many hours it will take you to follow the IFT recipe in your specific case. 


Here are the links for the resources for you to carefully review:

https://ift.world/preparing-level-ii-cfa-ift/

https://ift.world/last-3-months-study-strategy/

IFT Videos Duration, Index, Study Planners and Study Schedules


Also keep in mind that revision and practice are paramount to passing the Level II exam.


Good luck to you!