desperation vs joy killer

desperation

noun
  • The act of despairing or becoming desperate; a giving up of hope. 

  • A state of despair, or utter hopelessness; abandonment of hope. 

  • Reckless fury. 

joy killer

noun
  • killjoy (Someone or something that hinders fun.) 

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