ampulla vs cavity

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. 

cavity

noun
  • A hollow area within the body. 

  • A hole or hollow depression in a solid object. 

  • A small or large hole in a tooth caused by caries; often also a soft area adjacent to the hole also affected by caries. 

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