Aether vs Ether

Aether

name
  • One of the Greek primordial deities who was the personification of light, brother-husband of Hemera and grandson of Chaos. 

Ether

name
  • The god-personification of the bright, glowing upper air of heaven. He is the Roman counterpart of Aether. 

  • The ancient American prophet of Mormon theology who wrote the Book of Ether in the Book of Mormon. 

noun
  • A unit of the Ethereum digital currency, ETH. 

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