heartstopping vs voltaic

heartstopping

adj
  • Very exciting or shocking, as though to cause one's heart to skip beats. 

voltaic

adj
  • reminiscent of the action of electricity: thrilling, shocking, dramatic. 

  • producing electricity by chemical action. 

  • of or relating to electricity. 

How often have the words heartstopping and voltaic occurred in a corpus of books? (source: Google Ngram Viewer )