mind-altering vs psychedelic

mind-altering

adj
  • Altering the way someone's mind works. 

psychedelic

adj
  • Of, containing, generating, or reminiscent of drug-induced hallucinations, distortions of perception, altered awareness etc. 

  • Having bright colours, abstract shapes, etc. reminiscent of drug-induced hallucinations or distortions of perception. 

intj
  • awesome, cool, groovy 

noun
  • Any psychoactive substance (such as LSD or psilocybin) which, when consumed, causes perceptual changes (sometimes erratic and uncontrollable), visual hallucination, and altered awareness of the body and mind. 

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