man-of-war vs warrior

man-of-war

noun
  • A man whose occupation is fighting in wars; a soldier, a warrior. 

  • A powerful armed naval vessel, primarily one armed with cannon and propelled by sails; a warship. 

  • The Arctic skua (Stercorarius parasiticus). 

warrior

noun
  • A person who is actively engaged in battle, conflict or warfare; a soldier or combatant. 

  • A person who is aggressively, courageously, or energetically involved in an activity, such as athletics. 

How often have the words man-of-war and warrior occurred in a corpus of books? (source: Google Ngram Viewer )