enema vs permeate

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. 

permeate

noun
  • Liquid that has passed through a filtration system. 

  • A watery by-product of milk production. 

verb
  • To pass through the pores or interstices of; to penetrate and pass through without causing rupture or displacement; applied especially to fluids which pass through substances of loose texture 

  • To enter and spread through; to pervade. 

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