Pan vs genus Pan

Pan

name
  • Greek god of nature, often visualized as half goat and half man playing pipes. His Roman counterpart is Faunus. 

  • A moon of the planet Saturn. 

  • A surname. 

  • A suburb of Newport, Isle of Wight, England (OS grid ref SZ5088). 

genus Pan

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