idleness vs torpor

idleness

noun
  • The state of being idle; inactivity. 

  • Groundlessness; worthlessness; triviality; vanity; frivolity. 

  • The state of being indolent; indolence. 

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 idleness and torpor occurred in a corpus of books? (source: Google Ngram Viewer )