glower vs illuminant

glower

noun
  • That which glows or emits light. 

  • An angry glare or stare. 

verb
  • To look or stare with anger. 

illuminant

noun
  • Something that illuminates. 

adj
  • That illuminates. 

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