cartography vs hearing

cartography

noun
  • An illustrative discussion of a topic. 

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

hearing

noun
  • A proceeding at which discussions are heard. 

  • The sense used to perceive sound. 

  • The act by which something is heard. 

  • A legal procedure done before a judge, without a jury, as with an evidentiary hearing. 

adj
  • Able to hear, as opposed to deaf. 

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