enema vs lavage

enema

noun
  • The fluid so injected. 

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

  • A device for administering such an injection. 

lavage

noun
  • A washing of a hollow organ. 

  • A washing. 

verb
  • To wash a hollow organ 

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