screw up one's courage vs take heart

screw up one's courage

verb

  • Synonym of pluck up one's courage 

take heart

verb

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

intj

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

How often have the words screw up one's courage and take heart occurred in a corpus of books? (source: Google Ngram Viewer )