RichThesaurus
sweat one's guts out
vs
work one's guts out
sweat one's guts out
verb
to work very hard.
work one's guts out
verb
Synonym of sweat one's guts out
How often have the words
sweat one's guts out
and
work one's guts out
occurred in a corpus of books?
(source:
Google Ngram Viewer
)