agronomy vs thremmatology

agronomy

noun
  • The science of utilizing plants, animals and soils for food, fuel, feed, and fiber and more. To do this effectively and sustainably, agronomy encompasses work in the areas of plant genetics, plant physiology, meteorology, animal sciences and soil science. 

thremmatology

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

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