estival vs wintry

estival

adj
  • Coming forth in the summer. 

  • Of or relating to summer. 

wintry

adj
  • Containing sleet or snow. 

  • Aged, white-haired. 

  • Suggestive or characteristic of winter; cold, stormy. 

  • Chilling, cheerless. 

  • a wintry remark 

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