grey-haired vs hoar

grey-haired

adj

  • Having grey hair. 

  • old, wise, experienced. 

hoar

adj

  • Hoarily bearded. 

  • Of a white or greyish-white colour. 

noun

  • A white or greyish-white colour. 

  • Hoariness; antiquity. 

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