It seems the term "murder of crows" has recently become as popular as "flock of crows" https://books.google.com/ngrams/graph?year_end=2019&year_start=1800&cont

It seems the term "murder of crows" has recently become as popular as "flock of crows" https://books.google.com/ngrams/graph?year_end=2019&year_start=1800&content=flock+of+crows%2C+murder+of+crows&smoothing=3&corpus=26&case_insensitive=on&direct_url=t4%3B%2Cflock%20of%20crows%3B%2Cc0%3B%2Cs0%3B%3Bflock%20of%20crows%3B%2Cc0%3B%3Bflock%20of%20Crows%3B%2Cc0%3B.t4%3B%2Cmurder%20of%20crows%3B%2Cc0%3B%2Cs0%3B%3Bmurder%20of%20crows%3B%2Cc0%3B%3BMurder%20of%20Crows%3B%2Cc0%3B%3BMURDER%20OF%20CROWS%3B%2Cc0%3B%3BMurder%20of%20crows%3B%2Cc0#t4%3B%2Cflock%20of%20crows%3B%2Cc0%3B%2Cs0%3B%3Bflock%20of%20crows%3B%2Cc0%3B%3Bflock%20of%20Crows%3B%2Cc0%3B.t4%3B%2Cmurder%20of%20crows%3B%2Cc0%3B%2Cs0%3B%3Bmurder%20of%20crows%3B%2Cc0%3B%3BMurder%20of%20Crows%3B%2Cc0%3B%3BMURDER%20OF%20CROWS%3B%2Cc0%3B%3BMurder%20of%20crows%3B%2Cc0 https://books.google.com/ngrams/graph?year_end=2019&year_sta...