persist vs revise

persist

verb
  • To repeat an utterance. 

  • To go on stubbornly or resolutely. 

  • To cause to persist; make permanent. 

  • To continue to exist. 

revise

verb
  • To look over again (something previously written or learned), especially in preparation for an examination. 

  • To review, alter and amend, especially of written material. 

noun
  • A second proof sheet; a proof sheet taken after the first or a subsequent correction. 

  • A review or a revision. 

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