drop dead vs pay the debt of nature

drop dead

verb
  • To die suddenly. 

  • To be appalled or mortified. 

intj
  • Used angrily to express disgust, contempt, derision, etc., toward another person. 

pay the debt of nature

verb
  • To die. 

How often have the words drop dead and pay the debt of nature occurred in a corpus of books? (source: Google Ngram Viewer )