comet vs demon

comet

noun
  • Any of several species of hummingbird found in the Andes. 

  • A small Solar System body consisting mainly of volatile ice, dust and particles of rock whose very eccentric solar orbit periodically brings it close enough to the Sun that the ice vaporises to form an atmosphere, or coma, which may be blown by the solar wind to produce a visible tail. 

  • A celestial phenomenon with the appearance of such a body. 

demon

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

  • 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. 

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

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