heiress vs heritor

heiress

noun
  • A woman who has a right of inheritance or who stands to inherit. 

  • A woman who has received an inheritance. 

heritor

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

  • A proprietor or landholder in a parish. 

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