I want to refer to a few events that all last thousands of years.
My understanding is that if I use "thousands of year-long events", that means there are thousands of events; and each one of them are 1 year long. That isn't what I'm looking for.
Then I need to actually use "thousands of years long events". But I'm not sure how to hyphenate this. Is it
- "thousands of years long events"
- "thousands-of-years-long events"
or some other hyphenation perhaps?