combat vs prizefight

combat

noun
  • A battle, a fight (often one in which weapons are used). 

  • a struggle for victory 

verb
  • To fight; to struggle against. 

  • To fight (with); to struggle for victory (against). 

prizefight

noun
  • A professional boxing match, in which two boxers compete for a prize (usually money). 

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