X-ray vs radiograph

X-ray

verb
  • To take a radiograph of; to obtain an image of using X-ray radiation, especially for the purpose of medical diagnostic evaluation. 

noun
  • A radiograph: a photograph made with X-rays. 

  • Short wavelength electromagnetic radiation usually produced by bombarding a metal target in a vacuum. Used to create images of the internal structure of objects; this is possible because X-rays pass through most objects and can expose photographic film. 

  • An X-ray machine. 

adj
  • Of or having to do with X-rays. 

radiograph

verb
  • To produce a radiograph image. 

noun
  • An instrument for measuring and recording solar radiation. 

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

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