RichThesaurus
bust one's chops
vs
do one's darnedest
bust one's chops
verb
To exert oneself.
do one's darnedest
verb
To do one's utmost; to make every effort or to try every possible approach or way.
How often have the words
bust one's chops
and
do one's darnedest
occurred in a corpus of books?
(source:
Google Ngram Viewer
)