corpus vs essence

corpus

noun
  • A body, a collection. 

  • Such a collection in form of an electronic database used for linguistic analyses. 

  • A collection of writings, often on a specific topic, of a specific genre, from a specific demographic or a particular author, etc. 

essence

noun
  • A significant feature of something. 

  • Constituent substance. 

  • The concentrated form of a plant or drug obtained through a distillation process. 

  • A being; especially, a purely spiritual being. 

  • An extract or concentrate obtained from a plant or other matter used for flavouring, or as a restorative. 

  • The true nature of anything, not accidental or illusory. 

  • The inherent nature of a thing or idea. 

  • Fragrance, a perfume. 

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