cameraman vs descriptor

cameraman

noun
  • Coordinate term: camerawoman 

  • Somebody who operates a movie camera or television camera. 

descriptor

noun
  • A word or expression used to describe or identify something. 

  • A name associated with certain data or documents in an information storage and retrieval system; an index term. 

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