GI vs fighter

GI

verb
  • To clean aggressively. 

noun
  • One who is demanding and strict, in the manner of a stereotypical member of the military. 

  • A member of the U.S. military. 

fighter

noun
  • 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. 

  • 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. 

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