genetics vs stemma

genetics

noun
  • The branch of biology that deals with the transmission and variation of inherited characteristics, in particular chromosomes and DNA. 

  • The genetic makeup of a specific individual or species. 

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 genetics and stemma occurred in a corpus of books? (source: Google Ngram Viewer )