"Well, Mr. Jarndyce, sir," Mr. Guppy, after a moment’s consideration, began, to the great diversion of his mother, which she displayed by nudging Mr. Jobling with her elbow and winking at me in a most remarkable manner, "I had an idea that I should see Miss Summerson by herself and was not quite prepared for your esteemed presence.
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