alighten vs enlighten

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. 

enlighten

verb
  • To supply with light. 

  • To make something clear to (someone); to give knowledge or understanding to. 

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