But they were both happily relieved by the opportune appearance of Mike, the client with the fur cap and the habit of wiping his nose on his sleeve, whom I had seen on the very first day of my appearance within those walls.
There are no more uses of "opportune" in the book.
Show samples from other sources
They launched their company at an opportune time.
During the rare, inopportune social moments when I found myself squeezed between black and white, I fled to the black side,