"I always knew Salazar Slytherin was a twisted old loony," Ron told Harry and Hermione as they fought their way through the teeming corridors at the end of the lesson to drop off their bags before dinner.
There are no more uses of "teem" in the book.
Show samples from other sources
A rough mantelpiece teemed with small bright objets d’art made of plaster, porcelain, clay, and milk glass.
Harper Lee -- Go Set a Watchman
) fin sez u stol hz pen he’s a liar he wnts it I don’t have his pen hes a swmr finz a swimer buterfly u shuld c him nakd the abs omg when did you see him naked? swm teem sutes betr thn nakd *team remove head from gutter, G is he a good swimmer? made states he wnts yr lawrs number lawrs? *lawyers I peeked out of the curtains.
Laurie Halse Anderson -- The Impossible Knife of Memory