pronounce vs refrain

pronounce

verb
  • To sound out (a word or phrase); to articulate. 

  • To pronounce dead. 

  • To declare formally, officially or ceremoniously. 

  • To pass judgment. 

  • To sound like. 

  • To produce the components of speech. 

  • To declare authoritatively, or as a formal expert opinion. 

  • To read aloud. 

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. 

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