coffee shop vs pony keg

coffee shop

noun
  • A café-like establishment selling marijuana in the Netherlands. 

  • A small café or restaurant typically selling light refreshments along with coffee-based drinks. 

  • Used other than figuratively or idiomatically: see coffee, shop. 

pony keg

noun
  • A drive-through liquor store; by extension, any convenience store. 

  • A container for beer holding 7.75 US gallons, equal to half the size of a standard beer keg. 

How often have the words coffee shop and pony keg occurred in a corpus of books? (source: Google Ngram Viewer )