bleacher vs peanut gallery

bleacher

noun
  • The tiered seating provided for the audience at a television filming. 

  • One who, or that which, bleaches. 

  • A stand of tiered planks used as seating for spectators, often outdoors. 

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 bleacher and peanut gallery occurred in a corpus of books? (source: Google Ngram Viewer )