Swan vs specialization

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. 

specialization

noun
  • The area in which someone specializes. 

  • The adaptation of an organism to a specific environment, or adaptation of an organ to a particular function. 

  • A proof, axiom, problem, or definition whose cases are completely covered by another, broader concept. 

  • The act or process of specializing. 

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