ingestion vs manducation

ingestion

noun
  • The action of ingesting, or consuming something orally, whether it be food, drink, medicine, or other substance. It is usually referred to as the first step of digestion. 

  • The act of ingesting something into a jet engine. 

manducation

noun
  • The act of eating. 

  • The belief that eating the bread of Eucharist is eating the actual flesh of Jesus. 

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