Google Correlate was a service that provided users information about how strongly the frequency of multiple search terms correlates with each other over a specified time interval. Launched May 25, 2011; shut down December 15, 2019 — it lived 8 years. One of 37 Google products killed in 2019. https://de.wikipedia.org/wiki/Google_Correlate Data: Killed by Google (killedbygoogle.com, MIT).