hypnic vs torpid

hypnic

adj

  • That induces sleep. 

noun

  • Any sleep-inducing drug. 

torpid

adj

  • dormant or hibernating 

  • unmoving 

  • lazy, lethargic or apathetic 

noun

  • An inferior racing boat, or one who rows in such a boat. 

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