fatigue vs quicken

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. 

quicken

verb
  • To take on a state of activity or vigour comparable to life; to be excited or roused. 

  • To stimulate or assist the fermentation of (an alcoholic beverage, dough, etc.). 

  • To inspire or stimulate (an action, a feeling, etc.). 

  • To grow bright; to brighten. 

  • To put (someone or something) in a state of activity or vigour comparable to life; to excite, to rouse. 

  • Of a pregnant woman: to first feel the movements of the foetus, or reach the stage of pregnancy at which this takes place; of a foetus: to begin to move. 

  • To give life; to make alive. 

  • To inspire or stimulate. 

  • To apply quicksilver (mercury) to (something); to combine (something) with quicksilver; to quicksilver. 

  • To make (something) quicker or faster; to hasten, speed up. 

  • To come back to life, to receive life. 

  • To become quicker or faster. 

  • Of an alcoholic beverage, dough, etc.: to ferment. 

  • To give life to (someone or something never alive or once dead); to animate, to resurrect, to revive. 

noun
  • In full quicken tree: the European rowan, rowan, or mountain ash (Sorbus aucuparia). 

  • Synonym of couch grass (“a species of grass, Elymus repens”); also (chiefly in the plural), the underground rhizomes of this, and sometimes other grasses. 

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