box office vs playhouse

box office

noun
  • A place where tickets are sold in a theatre/theater or cinema. 

  • The total amount of money paid by people worldwide to watch a movie at cinemas/movie theaters. 

  • Quality of an entertainment or spectacle that makes it very popular with the public, or likely to be so. 

playhouse

noun
  • A venue for performing plays. 

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