dale vs glade

dale

noun
  • A valley, often in an otherwise hilly area. 

  • The sunken or grooved portion of the surface of a vinyl record. 

glade

noun
  • An open passage through a wood; a grassy open or cleared space in a forest. 

  • An everglade. 

  • An open space in the ice on a river or lake. 

  • A bright surface of ice or snow. 

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