longbeard vs whitebeard

longbeard

noun
  • Synonym of greybeard (“an old man”) 

  • A man with a long beard. 

  • Synonym of greybeard (“experienced long-time member of a group”) 

  • Synonym of greybeard (“a bellarmine”) 

whitebeard

noun
  • An old man; a greybeard. 

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