anxiogenic vs white-knuckle

anxiogenic

adj
  • Causing anxiety, or pertaining to the causing of anxiety. 

noun
  • An anxiogenic drug: a drug that causes anxiety. 

white-knuckle

adj
  • Causing fear, excitement, apprehension, suspense, or nervousness. 

verb
  • To grip tightly in fear, apprehension, suspense, or nervousness. 

  • To endure despite feeling terror, fear, apprehension, anxiety, discomfort, or torment. 

How often have the words anxiogenic and white-knuckle occurred in a corpus of books? (source: Google Ngram Viewer )