cartography vs orography

cartography

noun
  • The creation of charts and maps based on the layout of a territory's geography. 

  • An illustrative discussion of a topic. 

orography

noun
  • the orographic features of a region 

  • the scientific study, or a physical description of mountains 

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