faint vs fatigue

faint

verb
  • To lose courage or spirit; to become depressed or despondent. 

  • To decay; to disappear; to vanish. 

  • To lose consciousness through a lack of oxygen or nutrients to the brain, usually as a result of suddenly reduced blood flow (may be caused by emotional trauma, loss of blood or various medical conditions). 

adj
  • Lacking strength; weak; languid; inclined to lose consciousness 

  • Performed, done, or acted, weakly; not exhibiting vigor, strength, or energy 

  • Slight; minimal. 

  • Barely perceptible; not bright, or loud, or sharp 

  • Lacking courage, spirit, or energy; cowardly; dejected 

noun
  • The act of fainting, syncope. 

  • The state of one who has fainted; a swoon. 

fatigue

verb
  • To lose so much strength or energy that one becomes tired, weary, feeble or exhausted. 

  • To tire or make weary by physical or mental exertion. 

  • To cause to undergo the process of fatigue. 

  • To wilt a salad by dressing or tossing it. 

  • To undergo the process of fatigue; to fail as a result of fatigue. 

noun
  • Weakening and eventual failure of material, typically by cracking leading to complete separation, caused by repeated application of mechanical stress to the material. 

  • A weariness caused by exertion; exhaustion. 

  • A menial task or tasks, especially in the military. 

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