salon vs studio apartment

salon

noun
  • A large room, especially one used to receive and entertain guests. 

  • A beauty salon or similar establishment. 

  • An art gallery or exhibition; especially the Paris salon or autumn salon. 

  • A gathering of people for a social or intellectual meeting. 

studio apartment

noun
  • A small apartment that combines a number of rooms, often the living room, bedroom, and kitchen, into a single room. 

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