abjure vs have change of heart

abjure

verb
  • To reject with solemnity; to abandon forever; to repudiate; to disclaim. 

  • To abstain from; to avoid; to shun. 

  • To renounce upon oath; to forswear; to disavow. 

have change of heart

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