heritor vs replacement

heritor

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

  • A proprietor or landholder in a parish. 

replacement

noun
  • A person or thing that takes the place of another; a substitute. 

  • The removal of an edge of crystal, by one plane or more. 

  • The act of replacing something. 

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