date rape vs sex crime

date rape

noun
  • Rape committed by an acquaintance of the victim while out on a date. 

  • Rape committed after a perpetrator first secretly administers a sedative or memory-inhibiting drug (a date rape drug) to a victim under the cover of a social setting. 

sex crime

noun
  • An unlawful sexual act. 

How often have the words date rape and sex crime occurred in a corpus of books? (source: Google Ngram Viewer )