auditorium vs gymnasium

auditorium

noun
  • a large room for public meetings or performances 

  • the space where the audience is located 

gymnasium

noun
  • A large room or building for indoor sports. 

  • A type of secondary school in some European countries which typically prepares students for university. 

  • A public place or building where Ancient Greek youths took exercise, with running and wrestling grounds, baths, and halls for conversation. 

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