fading vs perishing

fading

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

perishing

noun
  • The act of something that perishes; decay or destruction. 

adj
  • Extreme; used of environmental or bodily conditions. 

  • Extremely cold. 

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