refrain vs slogan

refrain

noun
  • A much repeated comment, complaint, or saying. 

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

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

  • To abstain from (food or drink). 

slogan

noun
  • A catchphrase associated with a product or service being advertised. 

  • A distinctive phrase of a person or group of people (such as a movement or political party); a motto. 

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