auditorium vs family circle

auditorium

noun
  • the space where the audience is located 

  • a large room for public meetings or performances 

family circle

noun
  • A gallery in a theater, generally one containing inexpensive seats. 

  • The social circle comprising one's family. 

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