affaire d'honneur vs affray

affaire d'honneur

noun
  • A duel. 

affray

noun
  • The fighting of two or more persons, in a public place, to the terror of others. 

  • The act of suddenly disturbing anyone; an assault or attack. 

  • A tumultuous assault or quarrel. 

How often have the words affaire d'honneur and affray occurred in a corpus of books? (source: Google Ngram Viewer )