The spot had been consecrated to this ancient diversion from time immemorial, the old stocks conveniently forming a base facing the boundary of the churchyard, in front of which the ground was trodden hard and bare as a pavement by the players.
There are no more uses of "diversion" in the book.
Show samples from other sources
The attack on the capital was actually a diversion to draw troops away from the port city.
And I’d bet my broomstick he let that troll in, to make a diversion!
J.K. Rowling -- Harry Potter and the Sorcerer’s Stone