balmy vs estival

balmy

adj
  • Of weather, mild and pleasant. 

  • Producing balm. 

  • Soothing or fragrant. 

  • Foolish; slightly crazy or mad; eccentric. 

estival

adj
  • Of or relating to summer. 

  • Coming forth in the summer. 

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