old saw vs trivia

old saw

noun
  • A cliché, saying, or overused expression; especially a proverb or maxim. 

trivia

noun
  • Insignificant trifles of little importance, especially items of unimportant information. 

  • A quiz game that involves obscure facts. 

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