derby vs jockeying

derby

noun
  • A local derby. 

  • A sports match between rival teams. 

  • A bowler hat. 

  • Any of several annual horse races. 

  • Any organized race. 

jockeying

noun
  • The act of one who jockeys. 

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