barbershop vs parlor

barbershop

noun
  • The place of business of a barber; a store where a person (usually a male) can go to get a haircut. 

  • A style of a capella vocal music, sung in four-part harmony, typically by a quartet of men. 

verb
  • To perform in the barbershop musical style. 

parlor

noun
  • A shop or other business selling goods specified by context. 

  • The living room of a house, or a room for entertaining guests; a room for talking; a sitting-room or drawing room 

  • A shed used for milking cattle. 

  • A covered open-air patio. 

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