enema vs inoculation

enema

noun
  • A device for administering such an injection. 

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

  • The fluid so injected. 

inoculation

noun
  • The introduction of an antigenic substance or vaccine into the body to produce immunity to a specific disease. 

  • The insertion of the buds of one plant into another; grafting. 

  • An inoculum; that which is inoculated. 

  • The introduction of a microorganism into a culture medium. 

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