flowering vs solar day

flowering

noun
  • The period of time during which someone or something is at its peak. 

  • The period of time during which a plant is in flower. 

adj
  • Of a plant, that produces flowers. 

  • aflower, in bloom 

solar day

noun
  • one day of solar time, the time between successive noons; the time in which a planet such as Earth apparently rotates once around its axis, relative to the sun (on Earth about 24 hours as an average - the length of solar day is not constant throughout the year) 

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