I got to musing about time.
I was thinking about that wistful feeling when you think back on a book that you wrote, which meant a lot to you but which failed to set the world on fire. Thinking about the process of writing the expression “invested so much time” flitted across my brain.
I stopped to consider why was I using an economic metaphor to think about time? Time is something I “spend” or “invest.” I suspected that “invest time” was a modern expression and I checked the Google ngram viewer.
As you can see, the expression “invest time” and its variants really gained traction in the 1960s and has been growing ever since. “Spend time” had a bit more use early on, but it seems to have grown with industrialization and really rocketed, along with the expression about investing time, in 1960.
As I was born after 1960, I found it hard to come up with a comparable, older, expression to test against these. I drew a giant blank. The closest I came up with was to work for many years on something. This lacks the aspect of laboring over a period so it will pay off (another financial expression) later. Reap and ye shall sow.
What I’ve learned from all this pondering is that I find it surprisingly hard to break out of the frame of thinking of time as a precious commodity that can be spent or invested as one would budget a salary.
Maybe Arlo Guthrie has it right: