dormant vs hypnagogic

dormant

adj
  • Inactive, sleeping, asleep, suspended. 

  • In a sleeping posture; distinguished from couchant. 

  • Leaning. 

noun
  • A crossbeam or joist. 

hypnagogic

adj
  • That accompanies falling asleep; especially, pertaining to the semi-conscious period immediately preceding sleep. 

  • That induces sleep; soporific, somniferous. 

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