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