fatigue vs prostration

fatigue

noun
  • A weariness caused by exertion; exhaustion. 

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

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

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

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

  • 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. 

prostration

noun
  • The condition of being prostrated, as from heat; complete loss of strength. 

  • A part of the ordination of Catholic and Orthodox priests. 

  • The act or condition of prostrating oneself (lying flat), as a sign of humility. 

  • A reverential bow performed in Middle Eastern cultures. 

  • Being laid face down (prone). 

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