preventive vs prophylactic

preventive

noun
  • A contraceptive, especially a condom. 

  • A thing that slows the development of an illness. 

adj
  • Carried out to deter military aggression. 

  • Slowing the development of an illness; prophylactic. 

  • Preventing, hindering, or acting as an obstacle to. 

prophylactic

noun
  • A prophylactic condom. 

  • A medicine which preserves or defends against disease; a preventive. 

  • Any device or mechanism intended to prevent harmful consequences. 

adj
  • Serving to prevent or protect against an undesired effect, especially disease or pregnancy 

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