refrain vs tradition

refrain

verb
  • To stop oneself from some action or interference; to abstain. 

  • To abstain from (food or drink). 

noun
  • The chorus or burden of a song repeated at the end of each verse or stanza. 

  • A much repeated comment, complaint, or saying. 

tradition

noun
  • The act of delivering into the hands of another; delivery. 

  • An established or distinctive style or method 

  • A part of culture that is passed from person to person or generation to generation, possibly differing in detail from family to family, such as the way to celebrate holidays. 

  • A commonly held system. 

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