kinfolk vs stemma

kinfolk

noun
  • Relatives, relations. 

stemma

noun
  • A family tree or recorded genealogy 

  • In the study of stemmatics, a diagram showing the relationship of a text to its manuscripts 

  • One of the types of simple eyes in arthropods 

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