digging vs paleology

digging

noun
  • The action performed by a person or thing that digs. 

  • A place where ore is dug, especially certain localities in California, Australia, etc. where gold is obtained. 

paleology

noun
  • The study of antiquities or of the ancient past 

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