iniquity vs violation

iniquity

noun
  • An act of great injustice or unfairness; a sinful or wicked act; an unconscionable deed. 

  • Deviation from what is right; gross injustice, sin, wickedness. 

violation

noun
  • An infraction or a failure to follow a rule. 

  • Rape; sexual activity forced on another person without their consent. 

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