pill popper vs pillbox

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. 

pillbox

noun
  • A small box in which pills are kept. 

  • A flat, concrete gun emplacement. 

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