bravery vs qualm

bravery

noun
  • Being brave, courageousness. 

  • A brave act. 

  • Splendor, magnificence. 

qualm

verb
  • To have a sickly feeling. 

noun
  • A prick of the conscience; a moral scruple, a pang of guilt. 

  • A feeling of apprehension, doubt, fear etc. 

  • A sudden sickly feeling; queasiness. 

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