alighten vs dim

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. 

dim

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. 

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. 

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