How many simultaneous games during March Madness?

[Spektre]

Trying to make sure I am funded sufficently to place wagers on all games.

If memory serves, the games are staggered start with roughly 4 games going in quick succession and perhaps not being finished by the time the next group kicks off.

Are there ever more than say 8 games going on simultaneously before grading would occur on the first of them?

Thanks.