family room vs foyer

family room

noun
  • A comfortable room in a dwelling, for frequent leisure use. 

foyer

noun
  • A lobby, corridor, or waiting room, used in a hotel, theater, etc. 

  • A hostel offering accommodation and work opportunities to homeless young people. 

  • The crucible or basin in a furnace which receives the molten metal. 

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