forest vs ryegrass

forest

noun
  • A dense uncultivated tract of trees and undergrowth, larger than woods. 

  • A defined area of land set aside in England as royal hunting ground or for other privileged use; all such areas. 

  • Any dense collection or amount. 

  • A group of domains that are managed as a unit. 

  • The colour forest green. 

  • A graph with no cycles; i.e., a graph made up of trees. 

verb
  • To cover an area with trees. 

ryegrass

noun
  • A collection of plants of any of the species, as in a lawn or field. 

  • Any of several species of tufted grasses of the genus Lolium. 

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