pill gun vs user

pill gun

noun
  • Synonym of pill popper (“syringe-like device for administering medicinal pills to animals”) 

user

noun
  • A person who uses drugs, especially illegal drugs. 

  • One who uses or makes use of something, a consumer/client or an express or implied licensee (free user) or a trespasser. 

  • A person who uses a computer or a computing network, especially a person who has received a user account. 

  • An exploiter, an abuser (a person who "uses" people, that is treats and regards people unfairly, selfishly and/or unethically). 

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