persist vs reexpress

persist

verb
  • To repeat an utterance. 

  • To go on stubbornly or resolutely. 

  • To cause to persist; make permanent. 

  • To continue to exist. 

reexpress

verb
  • To express again 

  • To state again 

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