biosphere vs nook

biosphere

noun
  • The totality of living organisms and their environment. 

  • The part of the Earth and its atmosphere capable of supporting life. 

nook

noun
  • A small corner formed by two walls; an alcove. 

  • A hidden or secluded spot; a secluded retreat. 

  • A recess, cove or hollow. 

  • An English unit of land area, originally ¹⁄₄ of a yardland but later 12+¹⁄₂ or 20 acres. 

  • Coordinate term: tentabulge 

  • The vagina-like genitalia of a troll, featured in Homestuck fanworks but not in canon. 

verb
  • To withdraw into a nook. 

  • To situate in a nook. 

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