infinite checks

Hi Chessies:

This is probably a dumb question, please forgive me if it is.

Is a rule against a player repeating the same check back and forth while the clock runs down?  If a player, for instance, gets too aggressive and gets his queen down in my house, checks me, I block check, he moves to another check, I block it again, and he repeats the original check, I repeat the same block, etc. etc. etc.  If a player is ahead on time he can win the game this way.  Is there a rule to prevent this constant repeating of moves?

If the same position repeats 3 times, you can claim a draw.

If 50 moves pass without a capture or a pawn being moved, you can also claim a draw.

Thanks for the info rooperi!