grey vs greyish

grey

noun
  • UK and Commonwealth standard spelling of gray. 

adj
  • UK and Commonwealth standard spelling of gray. 

  • Synonym of coloured (pertaining to the mixed race of black and white). 

verb
  • UK and Commonwealth standard spelling of gray. 

greyish

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