pang of conscience vs resentment

pang of conscience

noun
  • A feeling of shame, guilt, or embarrassment, resulting from behavior which one regrets. 

resentment

noun
  • Anger or displeasure stemming from belief that one has been wronged or betrayed by others; indignation. 

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