fighter vs gunship

fighter

noun
  • A class of fixed-wing aircraft whose primary purpose is to shoot down other aircraft, sometimes accompanied by a secondary purpose of attacking ground targets. 

  • A warrior; a fighting soldier. 

  • A pugnacious, competitive person. 

  • A participant in boxing or any martial art. 

  • A person with a strong determination to resist protracted or severe adversity, especially illness. 

  • A firefighter. 

  • A person who fights; a combatant. 

  • A game with a focus on physical combat. 

gunship

noun
  • An armed helicopter tasked to attack the enemy. 

  • A transport airplane equipped with large calibre guns typical of armoured fighting vehicles 

  • A ship equipped with heavy artillery. 

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