SWAT vs derby

SWAT

noun

  • A SWAT team 

derby

noun

  • A local derby. 

  • A sports match between rival teams. 

  • A bowler hat. 

  • Any of several annual horse races. 

  • Any organized race. 

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