alighten vs limelight

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. 

limelight

verb
  • to illuminate with limelight 

noun
  • A type of stage lighting once used in theatres and music halls, producing a bright light by the use of incandescent quicklime. 

  • Attention, notice, a starring or central role, present fame. 

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