flowering vs sidereal 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 

sidereal day

noun
  • One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds). 

  • The rotational period of Earth; the time in which Earth rotates around its axis 360 degrees. 

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