bribery vs vampirism

bribery

noun
  • the activity of giving, offering or accepting bribes 

  • the making of illegal payment, or bribes, to persons in official positions as a means of influencing their decisions 

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