mall vs pony keg

mall

noun
  • An enclosed shopping centre. 

  • A heavy wooden mallet or hammer used in the game of pall mall. 

  • A pedestrianised street, especially a shopping precinct. 

  • A public walk; a level shaded walk, a promenade. 

verb
  • to build up with the development of shopping malls 

  • to shop at the mall 

  • to beat with a mall, or mallet; to beat with something heavy; to bruise 

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 mall and pony keg occurred in a corpus of books? (source: Google Ngram Viewer )