be hoist with one's own petard vs bite off more than one can chew

be hoist with one's own petard

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. 

How often have the words be hoist with one's own petard and bite off more than one can chew occurred in a corpus of books? (source: Google Ngram Viewer )