fatigue vs renew

fatigue

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. 

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. 

renew

noun
  • Synonym of renewal 

verb
  • To replace (something which has broken etc.); to replenish (something which has been exhausted), to keep up a required supply of. 

  • To repeat. 

  • To begin again; to recommence. 

  • To make new spiritually; to regenerate. 

  • To make (something) new again; to restore to freshness or original condition. 

  • To extend a period of loan, especially a library book that is due to be returned. 

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