alighten vs brighten

alighten

verb
  • To make light; to illuminate or brighten. 

  • To lighten; to reduce in weight or heaviness. 

  • To alight, to dismount or get down from. 

  • To alight; to land, to descend and rest. 

brighten

verb
  • To make bright or brighter in color. 

  • To make illustrious, or more distinguished; to add luster or splendor to 

  • To make more cheerful and pleasant; to enliven 

  • To grow bright, or more bright in color; to clear up 

  • To become brighter or more cheerful in mood 

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