catbird seat vs observatory

catbird seat

noun
  • An enviable position, often one of great advantage. 

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. 

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