noon vs perihelion

noon

noun
  • The highest point; culmination. 

  • The letter ن in the Arabic script. 

  • The time of day when the sun is in its zenith; twelve o'clock in the day, midday. 

verb
  • To relax or sleep around midday 

perihelion

noun
  • The highest point or state; the peak, zenith. 

  • The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun. 

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