ampulla vs demijohn

ampulla

noun
  • The dilated end of a duct. 

  • An Ancient Roman two-handled vessel. 

  • A vessel for containing consecrated wine or oil. 

  • The spongiole of a root. 

demijohn

noun
  • A large bottle with a short neck, sometimes with two small handles at the neck, sometimes encased in wickerwork. 

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