bowling alley vs derby

bowling alley

noun
  • A building which contains lanes for bowling. 

derby

noun
  • A bowler hat. 

  • A local derby. 

  • A sports match between rival teams. 

  • Any of several annual horse races. 

  • Any organized race. 

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