indifference vs torpor

indifference

noun
  • Unemotional apathy. 

  • Unconcerned nonchalance. 

  • The state of being indifferent. 

  • Unbiased impartiality. 

  • Self-identity defined through the negation of difference, non-difference. 

  • A lack of enthusiasm. 

torpor

noun
  • A state of apathy or lethargy. 

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

  • A state of being inactive or stuporous. 

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