deathmatch vs fight to the finish

deathmatch

noun
  • A competitive mode found in first-person shooter games in which competitors attempt to assassinate one another. 

verb
  • To take part in deathmatch gaming. 

  • To compete against in a deathmatch. 

fight to the finish

noun
  • A competition in which both parties continue until one side is unequivocally defeated. 

How often have the words deathmatch and fight to the finish occurred in a corpus of books? (source: Google Ngram Viewer )