armed conflict vs passage of arms

armed conflict

noun
  • A contested incompatibility that entails the use of armed force between two parties including a territory, the government of a state, or both. 

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 armed conflict and passage of arms occurred in a corpus of books? (source: Google Ngram Viewer )