fading vs wetting

fading

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

wetting

noun
  • An act of murdering or seriously injuring someone. 

  • The act of accidental urination on or in something. 

  • The act of making something wet. 

adj
  • That makes (something) wet. 

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