Level III of XX on the frequency path
Frequency rank 288 / 2,608
Frequent enough that you will keep running into it once you read past headlines.
More common than 土 (Dirt), less common than 質 (Quality).
Father chalks the day's characters up the Tree trunk and tests each kid at the gate; whoever stumbles goes into the barrel with the Lid waxed down and chants strokes in the dark until he can recite the whole trunk.
校 is rank 288 of 2,608 in published Japanese.
Study 校 →