noon vs solar apex

noon

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

  • The highest point; culmination. 

  • The letter ن in the Arabic script. 

verb
  • To relax or sleep around midday 

solar apex

noun
  • The point to which the Sun appears to be moving with respect to the local stars 

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