observatory vs scenery

observatory

noun
  • A lookout (vantage point with a view of the surrounding area) 

  • A place where stars, planets and other celestial bodies are observed, usually through a telescope; also place for observing meteorological or other natural phenomena. 

scenery

noun
  • View, natural features, landscape. 

  • Stage backdrops, property and other items on a stage that give the impression of the location of the scene. 

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