groundskeeping vs reclamation

groundskeeping

noun
  • The activity of tending an area of land for aesthetic or functional purposes; typically as an employee of a person or institution 

reclamation

noun
  • The recovery of a wasteland, or of flooded land so it can be cultivated. 

  • The act of reclaiming or the state of being reclaimed. 

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