anguish vs qualm

anguish

noun
  • Extreme pain, either of body or mind; excruciating distress. 

verb
  • To cause to suffer pain. 

  • To suffer pain. 

qualm

noun
  • A sudden sickly feeling; queasiness. 

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

  • A feeling of apprehension, doubt, fear etc. 

verb
  • To have a sickly feeling. 

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