farming vs thremmatology

farming

noun
  • A farming operation; a farm, or instance of farming on a piece of land. 

  • The business of cultivating land, raising stock etc. 

adj
  • Raising livestock or fish. 

  • Pertaining to the agricultural business. 

thremmatology

noun
  • The field of breeding or propagating plants and animals. 

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