den vs workshop

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. 

workshop

noun
  • A room, especially one which is not particularly large, used for manufacturing or other light industrial work. 

  • An academic conference. 

  • A brief, intensive course of education for a small group, emphasizing interaction and practical problem solving. 

verb
  • To help a playwright revise a draft of (a play) by rehearsing it with actors and critiquing the results. 

  • To improve through collaboration. 

  • To work on or revise something, especially collaboratively, in a workshop. 

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