dilemma vs qualm

dilemma

noun
  • A difficult circumstance or problem. 

  • A type of syllogism of the form "if A is true then B is true; if C is true then D is true; either A or C is true; therefore either B or D is true". 

  • A circumstance in which a choice must be made between two or more alternatives that seem equally undesirable. 

  • Offering to an opponent a choice between two (equally unfavorable) alternatives. 

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 dilemma and qualm occurred in a corpus of books? (source: Google Ngram Viewer )