museum vs showroom

museum

noun
  • A building or institution dedicated to the acquisition, conservation, study, exhibition, and educational interpretation of objects having scientific, historical, cultural or artistic value. 

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. 

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