phrase vs watchword

phrase

noun
  • A short written or spoken expression. 

  • A word or, more commonly, a group of words that functions as a single unit in the syntax of a sentence, usually consisting of a head, or central word, and elaborating words. 

  • A small section of music in a larger piece. 

  • A short individual motion forming part of a choreographed dance. 

verb
  • To perform a passage with the correct phrasing. 

  • To express (an action, thought or idea) by means of particular words. 

  • To divide into melodic phrases. 

watchword

noun
  • A word used as a motto, as expressive of a principle, belief, or rule of action; a rallying cry. 

  • A prearranged reply to the challenge of a sentry or a guard; a password or signal by which friends can be known from enemies. 

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