And how many hours a day did you do lessons?' said Alice, in a hurry to change the subject.Ten hours the first day,' said the Mock Turtle: 'nine the next, and so on.'What a curious plan!' exclaimed Alice.That's the reason they're called lessons,' the Gryphon remarked: 'because they lessen from day to day.
Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass
lessons