When you search via the Google forums tab (https://www.google.com/search?gl=us&hl=en&q=cool&udm=18#ip=1) there are dates within the meta descriptions:

e.g.

Mar 28, 2020 — “Cool” is an accepted adjective now and so is treated like any other adjective. Like Wilmar I don’t agree that adults don’t say it - at least in …

Would love to be able to get those in the data.