Hadean vs dim

Hadean

adj
  • Pertaining to Hades or hell. 

  • Of, or relating to the geological eon. 

name
  • The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago. 

dim

adj
  • Not bright or colorful. 

  • Indistinct, hazy or unclear. 

  • Not smart or intelligent. 

  • Disapproving, unfavorable: rarely used outside the phrase take a dim view of. 

verb
  • To render dim, obscure, or dark; to make less bright or distinct 

  • To make something less bright. 

  • To deprive of distinct vision; to hinder from seeing clearly, either by dazzling or clouding the eyes; to darken the senses or understanding of. 

  • To become darker. 

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