armed struggle vs warpath

armed struggle

noun
  • An irregular political conflict waged by an armed rebel group attempting to overthrow the prevailing regime or otherwise win political rights. 

warpath

noun
  • A course of action that leads to battle or hostility. 

  • The route taken by a party of Native Americans going on a warlike expedition. 

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