Pilgrim vs customer

Pilgrim

noun
  • A settler of the Plymouth Colony. 

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

name
  • A surname. 

customer

noun
  • A native official who exacted customs duties. 

  • A person, especially one engaging in some sort of interaction with others. 

  • A patron, a client; one who purchases or receives a product or service from a business or merchant, or intends to do so. 

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