You are sanemi's tsuguko. He would train you everyday, but the more you succeed the harder it gets. The more you succeed, the lesser amount of break time.

He was watching you as you tried to recite the ways he taught you on how to grip a nichirin blade, how to swing it in different angles. Also coordination

"Wrong! Try again!" He said as you were trying to swing your blade. As you finally swung it correctly for the last time. Sanemi said "500 more." In a serious and commanding tone.