affaire d'honneur vs passage of arms

affaire d'honneur

noun

  • A duel. 

passage of arms

noun

  • An argument or quarrel. 

  • A chivalric feat of arms involving the forcing of a passage protected by a knight or a group of knights. 

  • Any feat of arms, especially when used to display the prowess of the participants. 

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