crusader vs opponent

crusader

noun
  • An American, especially a soldier or leader who wages war against Islamist militants. 

  • the crusaders of the Middle Ages 

  • A Westerner; a Christian, especially of European descent or a missionary. 

  • A fighter in the medieval Crusades who had taken the Cross. 

  • A person engaged in a crusade. 

  • (either attributively or in the plural) The United States and its Western allies. 

opponent

noun
  • One who opposes another; one who works or takes a position against someone or something; one who attempts to stop the progress of someone or something. 

  • The participant who opens an academic debate by putting forward objections to a theological or philosophical thesis. 

  • One who opposes another in words (in a dispute, argument or controversy). 

  • One who is opposed or objects (to a policy, course of action or set of ideas). 

  • One who opposes another physically (in a fight, sport, game, or competition). 

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