mind-altering vs stunning

mind-altering

adj
  • Altering the way someone's mind works. 

stunning

adj
  • Having an effect that stuns. 

  • Exceptionally beautiful or attractive. 

  • Amazing; wonderfully good. 

noun
  • The act by which a person or animal is physically stunned. 

How often have the words mind-altering and stunning occurred in a corpus of books? (source: Google Ngram Viewer )