old saw vs saw

old saw

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

saw

noun
  • Such a tool with an abrasive coating instead of teeth. 

  • A sawtooth wave. 

  • A musical saw. 

  • A tool with a toothed blade used for cutting hard substances, in particular wood or metal. 

verb
  • To make a motion back and forth similar to cutting something with a saw. 

  • To be cut with a saw. 

  • simple past tense of see 

  • To form or produce (something) by cutting with a saw. 

  • To cut (something) with a saw. 

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