disperse vs vanish

disperse

verb
  • To break up and disappear; to dissipate. 

  • To scatter in different directions. 

  • To disseminate. 

  • To separate rays of light, etc., according to wavelength; to refract. 

  • To distribute throughout. 

adj
  • Scattered or spread out. 

vanish

verb
  • to disappear; to kidnap 

  • To become equal to zero. 

  • To become invisible or to move out of view unnoticed. 

noun
  • The brief terminal part of a vowel or vocal element, differing more or less in quality from the main part. 

  • A magic trick in which something seems to disappear. 

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