Swan vs tip over

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. 

tip over

noun
  • An action where the goalkeeper deflects the ball over the crossbar. 

verb
  • (to cause) to topple over and fall 

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