ghetto blaster vs radiograph

ghetto blaster

noun
  • A portable stereo system capable of playing music (from several sources) at a relatively high volume; a boom box. 

radiograph

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. 

verb
  • To produce a radiograph image. 

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