ecosphere vs situation

ecosphere

noun
  • the biosphere 

  • The portion of the atmosphere from sea-level to about 4000 meters in which it is possible to breathe without technological assistance. 

situation

noun
  • The place in which something is situated; a location. 

  • A position of employment; a post. 

  • The combination of circumstances at a given moment; a state of affairs. 

  • Position or status with regard to conditions and circumstances. 

  • An outfit, garment, or look. 

  • A difficult or unpleasant set of circumstances; a problem. 

  • An individual movie theater. 

  • The way in which something is positioned vis-à-vis its surroundings. 

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