Delphian vs divinatory

Delphian

name
  • A dialect of Ancient Greek. 

noun
  • A native or inhabitant of Delphi. 

adj
  • Of or relating to Delphi in Greece; Delphic. 

divinatory

adj
  • Pertaining to divination. 

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