aperient vs enema

aperient

noun
  • A laxative, either in the form of a medicine or a food such as asparagus or hops, which has the effect of moving the bowels, or aiding digestion and preventing constipation. 

adj
  • Having a gentle laxative effect. 

enema

noun
  • An injection of fluid into the large intestine by way of the rectum, usually for medical purposes. 

  • The fluid so injected. 

  • A device for administering such an injection. 

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