RichThesaurus
fly the coop
vs
make good one's escape
fly the coop
verb
To depart hastily or unannounced; to escape or flee.
To escape from a pen or similar enclosure.
make good one's escape
How often have the words
fly the coop
and
make good one's escape
occurred in a corpus of books?
(source:
Google Ngram Viewer
)