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