bravery vs cowardliness

bravery

noun
  • Being brave, courageousness. 

  • A brave act. 

  • Splendor, magnificence. 

cowardliness

noun
  • A cowardly action. 

  • The characteristic of being cowardly. 

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