Pirate vs gaffer

Pirate

noun
  • someone connected with Bristol Rovers Football Club, as a fan, player, coach etc. 

  • someone connected with any of a number of sports teams known as the Pirates, as a fan, player, coach etc. 

gaffer

noun
  • A chief lighting technician for a motion-picture or television production. 

  • The leader of a group or team, such as a boss, foreman, coach, publican. 

  • The baby in the house. 

  • A sailor. 

  • An old man. 

  • A glassblower. 

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