X-ray vs reproduce

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. 

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

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. 

reproduce

verb
  • To generate or propagate offspring or organisms sexually or asexually. 

  • To bring something to mind; to recall. 

  • To produce again; to recreate. 

  • To produce an image or copy of. 

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