angiograph vs angiography

angiograph

noun
  • The film or image of the blood vessels produced by angiography. 

angiography

noun
  • A medical imaging technique in which an X-ray image is taken to visualize the inside of blood vessels and organs of the body, with particular interest in the arteries, veins and the heart chambers. 

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