acquaintance rape vs date rape

acquaintance rape

noun
  • Rape by someone known to the victim, such as date rape, marital rape, or rape by a teacher or supervisor. 

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. 

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