celestial body vs half-moon

celestial body

noun
  • A natural object which is located outside of Earth's atmosphere, such as a comet, an asteroid, the Moon, a planet, the Sun, or a star. 

half-moon

noun
  • A semicircular or crescent-shaped Filipino butter cookie. 

  • The moon in its first or last quarter when only half the visible face is illuminated; a quarter moon. 

  • Anything shaped like a crescent, especially the base of a fingernail. 

  • Synonym of black and white (“type of cookie”) 

How often have the words celestial body and half-moon occurred in a corpus of books? (source: Google Ngram Viewer )