pill gun vs pill popper

pill gun

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

pill popper

noun
  • A syringe-like device for administering medicinal pills to animals. 

  • A person who enjoys or frequently takes medication in pill form. 

  • A person who frequently takes any other kind of pill, such as vitamins or illicit drugs. 

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