RichThesaurus
bite off more than one can chew
vs
overtax one's strength
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.
overtax one's strength
How often have the words
bite off more than one can chew
and
overtax one's strength
occurred in a corpus of books?
(source:
Google Ngram Viewer
)