vanish vs wear off

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. 

wear off

verb
  • to disappear because of being abraded, over-polished, or abused 

  • to diminish in effect 

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