angelic vs ethereal

angelic

adj
  • Of or pertaining to angelic acid. 

  • Belonging to, or proceeding from, angels; resembling, characteristic of, or partaking of the nature of, an angel. 

  • A regular Hausdorff space is said to be angelic if the closure of each relatively countably compact set A is compact and the closure consists of the limits of sequences in A. 

  • Very sweet-natured or well-behaved. 

ethereal

adj
  • To do with diethyl ether. 

  • Pertaining to the (real or hypothetical) upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere. 

  • Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc. 

  • Pertaining to the immaterial realm, as symbolically represented by, or (in earlier epochs) conflated with, such atmospheric and extra-atmospheric concepts. 

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