nimbus vs overglow

nimbus

noun
  • A circle of light; a halo. 

  • A gray rain cloud. 

overglow

noun
  • The glow of light appearing above or surrounding an object; halation 

  • The state of excessive glowing. 

verb
  • To beam or radiate; glow exceedingly or excessively 

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