elderly vs grizzled

elderly

adj
  • old; having lived for relatively many years. 

  • Of an object, being old-fashioned or frail due to aging. 

noun
  • An elderly person. 

  • Older people as a whole. 

grizzled

adj
  • greyed, old 

  • streaked or mixed with grey; grizzly; griseous 

  • grey or partly grey 

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