couch vs den

couch

noun
  • An item of furniture, often upholstered, for the comfortable seating of more than one person; a sofa. 

  • The den of an otter. 

  • A mass of steeped barley spread upon a floor to germinate, in malting; or the floor occupied by the barley. 

  • A preliminary layer, as of colour or size. 

  • Psychotherapy. 

  • Couch grass, a species of persistent grass, Elymus repens, usually considered a weed. 

  • A bed, a resting-place. 

verb
  • To attach a thread onto fabric with small stitches in order to add texture. 

  • To transfer (for example, sheets of partly dried pulp) from the wire mould to a felt blanket for further drying. 

  • To phrase in a particular style; to use specific wording for. 

  • To arrange or dispose as if in a bed. 

  • To bend the body, as in reverence, pain, labor, etc.; to stoop; to crouch. 

  • To lay something upon a bed or other resting place. 

  • To lay or deposit in a bed or layer; to bed. 

  • To lie down; to recline (upon a couch or other place of repose). 

  • To lower (a spear or lance) to the position of attack. 

  • In the treatment of a cataract in the eye, to displace the opaque lens with a sharp object such as a needle. The technique is regarded as largely obsolete. 

den

noun
  • A comfortable room not used for formal entertaining. 

  • Synonym of fort (“structure improvised from furniture, etc. for playing games.”) 

  • A group of Cub Scouts of the same age who work on projects together. 

  • A small cavern or hollow place in the side of a hill, or among rocks; especially, a cave used by a wild animal for shelter or concealment. 

  • A squalid or wretched place; a haunt. 

verb
  • To ensconce or hide oneself in (or as in) a den. 

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