grizzled vs silver-grey

grizzled

adj
  • grey or partly grey 

  • greyed, old 

  • streaked or mixed with grey; grizzly; griseous 

silver-grey

adj
  • Of a shiny pale grey colour. 

noun
  • A shiny pale grey colour. 

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