bite the biscuit vs take the heat

bite the biscuit

verb
  • To undertake an unpleasant task or to acknowledge an unfavorable situation or responsibility; bite the bullet. 

  • To die. 

take the heat

verb
  • To take the blame; to be the focus of anger or scrutiny; to take the consequences. 

How often have the words bite the biscuit and take the heat occurred in a corpus of books? (source: Google Ngram Viewer )