fading vs lightning

fading

noun
  • The process by which something fades; gradual diminishment. 

lightning

noun
  • A discharge of this kind. 

  • A flash of light produced by short-duration, high-voltage discharge of electricity within a cloud, between clouds, or between a cloud and the earth. 

  • Anything that moves very fast. 

verb
  • To produce lightning. 

adj
  • Extremely fast or sudden; moving (as if) at the speed of lightning. 

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