exocarp vs fruition

exocarp

noun
  • The outermost layer of the pericarp of fruits; the skin or epicarp 

fruition

noun
  • The condition of bearing fruit. 

  • The fulfillment of something worked for. 

  • The enjoyment derived from a possession. 

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