operating theatre vs workshop

operating theatre

noun
  • A room in a hospital used for performing surgery (originally designed for operations in front of observers). 

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 operating theatre and workshop occurred in a corpus of books? (source: Google Ngram Viewer )