coup de grace vs dissolution

coup de grace

dissolution

noun
  • The termination of an organized body or legislative assembly, especially a formal dismissal. 

  • The quality of being dissolute. 

  • Dissolving, or going into solution. 

  • Disintegration, or decomposition into fragments. 

How often have the words coup de grace and dissolution occurred in a corpus of books? (source: Google Ngram Viewer )