barbershop vs watering hole

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. 

watering hole

noun
  • A bar or other local drinking establishment. 

  • A depression in which water collects and where animals come to drink. 

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