dynamo vs weapon

dynamo

noun
  • An electricity generator; a dynamo-electric machine. 

  • The mechanism by which a celestial body, such as the Earth or a star, generates a magnetic field. 

  • An energetic person. 

weapon

noun
  • A tool of any kind. 

  • An idiot, an oaf, a fool, a tool; a contemptible or incompetent person. 

  • An instrument of attack or defense in combat or hunting, e.g. most guns, missiles, or swords; arm. 

  • An instrument or other means of harming or exerting control over another. 

  • A very skilled, competent, or capable person or thing worthy of awe. 

verb
  • To equip with a weapon; to arm. 

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