peanut gallery vs vestibule

peanut gallery

noun
  • In the nineteenth century, the cheap seats at the back of a theatre or in the upper balcony. 

  • Any source of heckling, unwelcome commentary or criticism, especially from a know-it-all or of an inexpert nature. May also now refer to general audience response: "Let's hear it from the peanut gallery." 

  • The upper balcony to which black patrons were restricted in racially segregated venues such as theatres. 

vestibule

noun
  • A small entrance hall, antechamber, passage, or room between the outer door and the main hall, lobby, or interior of a building. 

  • An enclosed entrance at the end of a railway passenger car. 

  • The central cavity of the bony labyrinth of the inner ear or the parts (such as the saccule and utricle) of the membranous labyrinth that it contains. 

  • The part of the left ventricle below the aortic orifice. 

  • The part of the mouth outside the teeth and gums. 

  • Any of a number of body cavities or channels, serving as or resembling an entrance to another bodily space. 

  • A large entrance hall in a temple or palace. 

verb
  • To furnish with a vestibule or vestibules. 

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