Google Tests Use over time for: in Dictionary SERP Feature

This could be a new feature in Dictionary SERP Feature on Google, you can now see a graph that shows the Use over time for the definition you look for on Google. The feature is hidden behind the Translations and more definitions toggle.

Sample Query: Try searching for Sample Query on Mobile or Desktop. I was able to trigger the result from Australia.

UPDATE: Not new, this was seen from a screenshot from way back in 2017.