oneiric vs unearthly

oneiric

adj
  • Of or pertaining to dreams. 

  • Resembling a dream; dreamlike. 

unearthly

adj
  • Preternatural or supernatural. 

  • Ideal beyond the mundane. 

  • Ridiculous, ludicrous, or outrageous. 

  • Strange, enigmatic, or mysterious. 

  • Not of the earth; non-terrestrial. 

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