Pole vs Swan

Pole

noun
  • A person from Poland or of Polish descent. 

name
  • A surname. 

Swan

noun
  • someone connected with Swansea City Football Club, as a fan, player, coach, etc. 

  • someone connected with the Sydney Swans, as a fan, player, coach, etc. 

name
  • A surname transferred from the nickname. 

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