meadow vs muskeg

meadow

noun
  • Low land covered with coarse grass or rank herbage near rivers and in marshy places by the sea. 

  • A field or pasture; a piece of land covered or cultivated with grass, usually intended to be mown for hay. 

muskeg

noun
  • A terrain composed of peat bog with tussocky meadow and woody vegetation including spruce. 

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