Happens to coincide with massive money printing operations by the govt.
https://x.com/paulisci/status/1549527748950892544?s=46
1981, 1969, 1952, 1940, 1916, 1894 (oldest), just a few.
Almost as if, you know, humans have an innate ability to make their own economic calculations about the time value of their labor in a free market. 
Discussion
There were more too. Would make for interesting research to chart the phrase from Google data vs money supply.
They weren’t printing money in 1894 though. I think humans are generally lazy, but money printing incentivizes you to not work. And of course, government incentivizes people to not work because welfare programs get politicians the vote they want.
It's an inverse incentive. When govt goes hard on the printer people get a "what's the point" attitude towards work because they can't keep up anyway.