robbery vs vampirism

robbery

noun
  • The offense of taking or attempting to take the property of another by force or threat of force. 

  • The act or practice of robbing. 

vampirism

noun
  • extortion 

  • practices associated with vampires, in particular blood-drinking and the draining of a victim's life-force. 

  • Systemic lupus erythematosus (autoimmune disease) 

  • the state of being a vampire 

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