showroom vs variety store

showroom

noun
  • A room in a business set aside for the display of the company's products. 

verb
  • To inspect merchandise in a physical store, then purchase the identical product from an online merchant; to use a physical store as a showroom for an online merchant. 

variety store

noun
  • A shop where many small and inexpensive items can be bought. 

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