The average working week was now about twenty hours— but those twenty hours were no sinecure.
There are no more uses of "sinecure" in the book.
Show samples from other sources
He does have a job in the company library, an undemanding sinecure where he can do a lot of reading without bothering anyone, and occasionally he does a little research for one of the legitimate biologists on the staff.
William Styron -- Sophie’s Choice
After confessing to these things they had been pardoned, reinstated in the Party, and given posts which were in fact sinecures but which sounded important.