bravery vs feebleness

bravery

noun
  • Being brave, courageousness. 

  • A brave act. 

  • Splendor, magnificence. 

feebleness

noun
  • The quality or state of being feeble; debility; infirmity. 

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