idyllic vs oneiric

idyllic

adj
  • Of or pertaining to idylls. 

  • Extremely happy, peaceful, or picturesque. 

noun
  • An idyllic state or situation. (A substantive use of the adjective) 

oneiric

adj
  • Of or pertaining to dreams. 

  • Resembling a dream; dreamlike. 

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