How to know exactly how long a stun last? And what kind of stun can not be held?

So I have tried to search this question's answer use the search function in this board, but I have not found a exactly answer I need, so I decided to post a new thread here.

I know there are couples kind of stun , and they also looks last different length of time. So how to know exactly how long a stun last? Does the "advantage" in the first page of the move details tell you how long a stun last?

Another questions is what kinds of stun if opponent gets can not be hold and/or SE? I know some...

How to know exactly how long a stun last? And what kind of stun can not be held?