electric shock vs palpitation

electric shock

noun
  • An instance of subjecting (someone or something) to an electric shock. 

  • The physical reaction or shock caused by the flow of electricity through the body. 

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 electric shock and palpitation occurred in a corpus of books? (source: Google Ngram Viewer )