frisson vs palpitation

frisson

noun
  • A sudden surge of excitement. 

  • A shiver; a thrill. 

palpitation

noun
  • An abnormal beating of the heart that may be perceived by the patient, a result of excitement, exertion, or illness. 

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