Pirate vs demon

Pirate

noun
  • someone connected with Bristol Rovers Football Club, as a fan, player, coach etc. 

  • someone connected with any of a number of sports teams known as the Pirates, as a fan, player, coach etc. 

demon

noun
  • A false god or idol; a Satanic divinity. 

  • A person's inner spirit or genius; a guiding or creative impulse. 

  • A spirit not considered to be inherently evil; a (non-Christian) deity or supernatural being. 

  • A person's fears or anxieties. 

  • Someone with great strength, passion or skill for a particular activity, pursuit etc.; an enthusiast. 

  • A very wicked or malevolent person; also (in weakened sense) a mischievous person, especially a child. 

  • A tutelary deity or spirit intermediate between the major Olympian gods and mankind, especially a deified hero or the entity which supposedly guided Socrates, telling him what not to do. 

  • An evil spirit resident in or working for Hell; a devil. 

  • A source (especially personified) of great evil or wickedness; a destructive feeling or character flaw. 

  • A hypothetical entity with special abilities postulated for the sake of a thought experiment in philosophy or physics. 

  • Any of various hesperiid butterflies of the genera Notocrypta and Udaspes. 

  • A type of patience or solitaire (card game) played in the UK and/or US. 

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