[The usage of the word “oof” was highest in 1618 much higher than in 2019](https://books.google.com/ngrams/graph?content=oof&year_start=1600&year_end=2019&corpus=26&smoothing=3&direct_url=t1%3B%2Coof%3B%2Cc0#t1%3B%2Coof%3B%2Cc0)