pony keg vs tea 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. 

tea shop

noun
  • A shop that sells tea. 

  • A cafe where tea is served with light (usually sweet) foods. 

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