comet vs shooting star

comet

noun
  • A small Solar System body consisting mainly of volatile ice, dust and particles of rock whose very eccentric solar orbit periodically brings it close enough to the Sun that the ice vaporises to form an atmosphere, or coma, which may be blown by the solar wind to produce a visible tail. 

  • Any of several species of hummingbird found in the Andes. 

  • A celestial phenomenon with the appearance of such a body. 

shooting star

noun
  • A meteor, especially a streak of light in the night sky, caused by a meteoroid burning up as it enters the Earth’s atmosphere. 

  • Any of several wild flowering plants in the genus Dodecatheon, mostly found in Western North America. 

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