comeuppance vs deathblow

comeuppance

noun
  • Retribution or outcome that is justly deserved. 

deathblow

noun
  • A strike or blow that leads to death, especially a coup de grace. 

  • Something that prevents the completion, or ends the existence, of a project etc.; a fatal setback. 

How often have the words comeuppance and deathblow occurred in a corpus of books? (source: Google Ngram Viewer )