autosuggestion vs symbolization

autosuggestion

noun
  • The practice of suggesting thoughts to oneself, as in autohypnosis. 

  • An instance of suggesting a thought to oneself. 

  • An autosuggest feature. 

symbolization

noun
  • The unconscious mental representation of one thing by another. 

  • The act of symbolizing; the use of symbols to represent things, or the investing of things with a symbolic meaning. 

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