Ether vs Mania

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. 

Mania

name

  • The goddess of the dead and ghosts. 

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