RichThesaurus
bite off more than one can chew
vs
push oneself too hard
bite off more than one can chew
verb
To try to do too much; to take on or attempt more than one is capable of doing.
push oneself too hard
How often have the words
bite off more than one can chew
and
push oneself too hard
occurred in a corpus of books?
(source:
Google Ngram Viewer
)