take heart vs win back

take heart

verb
  • To be courageous; to regain one's courage. 

intj
  • Used when encouraging someone to bear or take up a difficult situation. 

win back

verb
  • To regain favour (with). 

  • To get (someone) to be one's partner, after having been apart. 

  • To win (something) that one has previously lost. 

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