aftercomer vs scion

aftercomer

noun
  • One coming after; a successor; (in the plural) posterity. 

scion

noun
  • The heir to a throne. 

  • A detached shoot or twig containing buds from a woody plant, used in grafting; a shoot or twig in a general sense. 

  • A guardian. 

  • A descendant, especially a first-generation descendant of a distinguished family. 

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