exhaustion vs torpor

exhaustion

noun
  • Supreme tiredness; having exhausted energy. 

  • An exhaustive procedure 

  • The point of complete depletion, of the state of being used up. 

torpor

noun
  • A state of being inactive or stuporous. 

  • A state similar to hibernation characterised by energy-conserving, very deep sleep. 

  • A state of apathy or lethargy. 

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