boards vs theater

boards

noun
  • A stage (as in a theater). 

  • A hardcover binding on a book. 

  • Examinations given for entry to college or to qualify for a profession. 

  • Structure around a rink for ice hockey. 

theater

noun
  • A cinema. 

  • A conspicuous but unproductive display of action. 

  • Any place rising by steps like the seats of a theater. 

  • An operating theatre or locale for human experimentation. 

  • A place or building, consisting of a stage and seating, in which an audience gathers to watch plays, musical performances, public ceremonies, and so on. 

  • Drama or performance as a profession or art form. 

  • A region where a particular action takes place; a specific field of action, usually with reference to war. 

  • A lecture theatre. 

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