Pilgrim vs colonizer

Pilgrim

noun
  • A settler of the Plymouth Colony. 

  • Someone connected with Plymouth Argyle Football Club, as a fan, player, coach etc. 

name
  • A surname. 

colonizer

noun
  • One who makes a group or place into a colony; one who establishes a colonial relationship. 

  • One who establishes or joins a colony; a colonist. 

  • One who intrudes and takes over. 

  • A species that establishes itself in a new area. 

  • A white person. 

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