boldness vs strongheartedness

boldness

noun
  • The state of being bold; courage. 

  • The relative weight of a font; the thickness of its strokes. 

  • presumptuousness 

strongheartedness

noun
  • Courage, bravery. 

  • Resilience, endurance. 

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