music hall vs variety show

music hall

noun
  • A vaudeville or variety theater. 

  • An auditorium for concerts and musical entertainments. 

variety show

noun
  • A type of entertainment featuring a succession of short, unrelated performances by various artistes such as (depending on the medium) acrobats, comedians, dancers, magicians, singers, etc. 

How often have the words music hall and variety show occurred in a corpus of books? (source: Google Ngram Viewer )