something about fixedupdate()

Unity Engine
1

hi,everyone ,i wanna ask about the fixedupdate()
as we know , update() calls every frame,and how about the fixedupdate()?
when will the next fixedupdate() be called after the nearest previous one ?

2
3

actually i didnt figure out the “every fixed framerate frame” , what is the framerate?

4
5

oh , thanks ! thats what i want!