How many norms for FIDE titles?

Now I’m curious about circumstances where you would need 4 norms. At first glance, 3 would seem sufficient because you have to play at least 9 games in a norm tournament (1.41a). However, there are some exceptions, such as

and

So, it looks like it is possible to earn an 8 game norm (due to a bye or forfeit) or even 7 game norms (7 round World or Continental Team). Thus, it should be possible to earn 3 norms but fall up to 6 games short of the 27 game requirement.

Has this ever happened?

I don’t see any way to get a norm with 6 or fewer games, so 4 norms should always be enough.