mind-altering vs overwhelming

mind-altering

adj

  • Altering the way someone's mind works. 

overwhelming

adj

  • Very great or intense. 

  • Extreme. 

  • Overpowering, staggering, or irresistibly strong. 

noun

  • A situation of being overwhelmed. 

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