compelling vs vampirism

compelling

noun
  • An act of compulsion; an obliging somebody to do something. 

adj
  • Strongly or irresistibly evoking interest or attention. 

  • Forceful. 

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 compelling and vampirism occurred in a corpus of books? (source: Google Ngram Viewer )