egestion vs excretion

egestion

noun
  • The act or result of egesting 

excretion

noun
  • The process of removing or ejecting material that has no further utility, especially from the body; the act of excreting. 

  • Something excreted in that manner, especially urine or feces. 

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