acquaintance rape vs ravishment

acquaintance rape

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

ravishment

noun
  • rape 

  • ecstasy 

  • seizure by force 

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