forbear vs refrain

forbear

verb
  • To keep away from; to avoid; to abstain from. 

  • To control oneself when provoked. 

  • To refuse; to decline; to withsay; to unheed. 

  • To refrain from proceeding; to pause; to delay. 

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 forbear and refrain occurred in a corpus of books? (source: Google Ngram Viewer )