heirdom vs heritage

heirdom

noun
  • An inheritance or succession. 

heritage

noun
  • An inheritance; property that may be inherited. 

  • A tradition; a practice or set of values that is passed down from preceding generations through families or through institutional memory. 

  • Having a certain background, such as growing up with a second language. 

  • A birthright; the status acquired by birth, especially of but not exclusive to the firstborn. 

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