Useful data: https://trends.google.com/trends/explore?date=all&geo=GB&q=sitcom,situation%20comedy https://trends.google.com/trends/explore?date=all&geo=GB&q=s.

Useful data: https://trends.google.com/trends/explore?date=all&geo=GB&q=sitcom,situation%20comedy https://trends.google.com/trends/explore?date=all&geo=GB&q=s... https://books.google.com/ngrams/graph?content=sitcom%2C+situation+comedy&year_start=1800&year_end=2019&corpus=26&smoothing=3&direct_url=t1%3B%2Csitcom%3B%2Cc0%3B.t1%3B%2Csituation%20comedy%3B%2Cc0 https://books.google.com/ngrams/graph?content=sitcom%2C+situ... It looks like sitcom ran in parallel below situation comedy from the start, then sitcom took over with the boom in the 1980s. Situation comedy never went away, but it never came close once they diverged.