dispersal vs wetting

dispersal

noun
  • The act or result of dispersing or scattering; dispersion. 

  • A dispersal prison. 

wetting

adj
  • That makes (something) wet. 

noun
  • An act of murdering or seriously injuring someone. 

  • The act of accidental urination on or in something. 

  • The act of making something wet. 

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