Re:“Out of an abundance of caution” – An overused phrase (2015)
by richardfontana on Saturday March 14, 2020 @11:58PM
(#22581138)
Specifically for "out of an abundance of caution", in Google Books there begin to be usages around 1911, based on a very quick search. As noted by someone else it's a pretty common phrase among American lawyers.
https://books.google.com/books?id=4zJWAAAAYAAJ&newbks=1&newb...