crystal-gazing vs prediction

crystal-gazing

noun
  • The making of predictions about the future, especially when these are seen as very speculative. 

  • The action or practice of gazing into a crystal ball in the hope or belief of seeing the future. 

prediction

noun
  • A statement of what will happen in the future. 

  • A probability estimation based on statistical methods. 

How often have the words crystal-gazing and prediction occurred in a corpus of books? (source: Google Ngram Viewer )