afforestation vs forestation

afforestation

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

forestation

noun
  • The act of planting a forest. 

  • The conversion of a habitat to forest. 

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