discount store vs mart

discount store

noun
  • A type of department store which sell products at prices lower than those asked by other department stores. 

mart

noun
  • A shop, store. 

  • Marque (chiefly used in the phrase letters of mart). 

  • A bazaar, fair, marketplace. 

  • Salt beef. 

  • A head of feeder cattle or fattened cattle (usually the latter). 

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