bleacher vs gymnasium

bleacher

noun
  • A stand of tiered planks used as seating for spectators, often outdoors. 

  • One who, or that which, bleaches. 

  • The tiered seating provided for the audience at a television filming. 

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 bleacher and gymnasium occurred in a corpus of books? (source: Google Ngram Viewer )