heritor vs parcener

heritor

noun
  • A person who inherits; an heir or heiress. 

  • A proprietor or landholder in a parish. 

parcener

noun
  • A coheir, or one of two or more heirs to an estate that descends jointly, and by whom it is held as a single estate. 

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