high fidelity vs radiograph

high fidelity

noun
  • The electronic reproduction of a given sound or image with relatively high accuracy. 

  • A high-quality reproduction of sound. 

adj
  • Characterized by minimal distortion. 

radiograph

noun
  • An image, often a photographic negative, produced by radiation other than normal light; especially an X-ray photograph. 

  • An instrument for measuring and recording solar radiation. 

verb
  • To produce a radiograph image. 

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