brave vs liver-hearted

brave

adj
  • Strong in the face of fear; courageous. 

  • Making a fine show or display. 

  • Foolish or unwise. 

verb
  • After braving tricks on the high-dive, he braved a jump off the first diving platform. 

  • To encounter with courage and fortitude, to defy, to provoke. 

liver-hearted

adj
  • cowardly 

How often have the words brave and liver-hearted occurred in a corpus of books? (source: Google Ngram Viewer )