afforestation vs forestry

afforestation

noun
  • The act or process of creating a new forest where none had existed before, or reforestation of areas long deforested. 

forestry

noun
  • The science of planting and growing trees in forests. 

  • A forest-covered area. 

  • The art and practice of planting and growing trees in forests. 

  • The art and practice of cultivating, exploiting and renewing forests for commercial purposes. 

  • Commercial tree farming. 

  • A tree farm. 

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