Stick vs prison camp

Stick

noun
  • A member of the Official IRA. 

name
  • The Chapman Stick, an electric musical instrument devised by Emmett Chapman. 

prison camp

noun
  • A camp in which either prisoners of war or political prisoners are interned. 

  • A low-security federal prison. 

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