photograph vs photography

photograph

noun
  • A picture created by projecting an image onto a photosensitive surface such as a chemically treated plate or film, CCD receptor, etc. 

verb
  • To appear in a photograph. 

  • To fix permanently in the memory etc. 

  • To take a photograph (of). 

photography

noun
  • The art and technology of producing images on photosensitive surfaces, and its digital counterpart. 

  • The occupation of taking (and often printing) photographs. 

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