crusader vs promoter

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. 

promoter

noun
  • One who promotes. 

  • One who promotes entertainment events or goods. 

  • The section of DNA that controls the initiation of RNA transcription as a product of a gene. 

  • An accelerator of catalysis that is not itself a catalyst. 

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