glade vs snowpack

glade

noun
  • A bright surface of ice or snow. 

  • An everglade. 

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

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

snowpack

noun
  • An accumulation of packed snow, usually the seasonal amount. 

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