autumnal vs wintry

autumnal

adj
  • Of or relating to autumn. 

  • Past the middle of life; in the third stage. 

wintry

adj
  • Suggestive or characteristic of winter; cold, stormy. 

  • Containing sleet or snow. 

  • Aged, white-haired. 

  • Chilling, cheerless. 

  • a wintry remark 

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