Upward spiral is a bigram that shows up around turn of 20th century[0] but is undeniably rare compared to downward spiral[1]. Spiraling and spinning out of cont

Upward spiral is a bigram that shows up around turn of 20th century[0] but is undeniably rare compared to downward spiral[1]. Spiraling and spinning out of control don’t really seem to show up until the 20th century either, I’m guessing because of flight and rocketry, but that’s just wild speculation. [0] https://books.google.com/ngrams/graph?content=Upward+spiral&year_start=1800&year_end=2019&corpus=en-2019&smoothing=3 https://books.google.com/ngrams/graph?content=Upward+spiral&... [1] https://books.google.com/ngrams/graph?content=Upward+spiral%2C+downward+spiral&year_start=1800&year_end=2019&corpus=en-2019&smoothing=3 https://books.google.com/ngrams/graph?content=Upward+spiral%...