assassin vs desperado

assassin

noun
  • Any ruthless killer. 

  • A member of the Nizari Ismaili Muslim community of the Alamut Period. 

  • Someone who intentionally kills a person, especially a professional who kills a public or political figure. 

verb
  • To assassinate. 

desperado

noun
  • A bold outlaw, especially one from southern portions of the Wild West. 

  • A person who is desperately in love or is desperate for a romantic or sexual relationship. 

  • A piece that seems determined to give itself up, typically to bring about stalemate or perpetual check. 

  • A person in desperate circumstances or who is at the point of desperation, such as a down-and-outer, an addict, etc. 

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