goose bump vs piloerection

goose bump

noun
  • Raised skin, usually caused by the involuntary erection of hairs on the neck or arms caused by cold, excitement, or fear. 

piloerection

noun
  • The erection of hairs or papillae 

  • goose bumps; goose pimples 

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