inertness vs torpor

inertness

noun
  • Lack of activity or exertion; habitual indisposition to action or motion 

  • Absence of the power of self-motion; inertia. 

  • Quality of being unreactive with other chemical compounds or elements. 

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