corridor vs peanut gallery

corridor

noun
  • A narrow hall or passage with rooms leading off it, as in a building or in a railway carriage. 

  • Airspace restricted for the passage of aircraft. 

  • The covered way lying round the whole compass of the fortifications of a place. 

  • The land near an important road, river, railway line 

  • A restricted tract of land that allows passage between two places. 

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. 

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