injustice vs violation

injustice

noun
  • Violation of the rights of another person or people. 

  • Absence of justice; unjustice. 

  • Unfairness; the state of not being fair or just. 

violation

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

  • An infraction or a failure to follow a rule. 

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