forage vs prospecting

forage

noun
  • An act or instance of foraging. 

  • Fodder for animals, especially cattle and horses. 

verb
  • To rampage through, gathering and destroying as one goes. 

  • To rummage. 

  • Of an animal: to seek out and eat food. 

  • To search for and gather food for animals, particularly cattle and horses. 

prospecting

noun
  • The act of one who prospects. 

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