genarian vs greybeard

genarian

noun
  • An elderly person, especially one over the age of 60. 

adj
  • Concerning rules or principles as opposed to acts. 

greybeard

noun
  • An old man. 

  • A coarse earthenware vessel for holding liquor; a bellarmine. 

  • Any of the members of a group who have been there the longest, often implying experience. 

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