statutory rape vs violation

statutory rape

noun
  • An illegal act of sexual intercourse by an adult with a person under the legal age of consent for sex, or with another adult who is not able to consent because of intellectual disability. 

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 statutory rape and violation occurred in a corpus of books? (source: Google Ngram Viewer )