OR vs operating theater

OR

noun
  • The binary operator inclusive or, true if one at least one of two inputs is true. In infix notation. 

conj
  • A logical gate to implement inclusive or. 

  • Inclusive or; either one proposition or the other is true or both. 

  • A lexical symbol to implement inclusive or in a computer language. 

name
  • Orissa, a state of India. 

  • Oregon, a state of the United States of America. 

operating theater

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