florescence vs flowering

florescence

noun
  • The time, or the condition, of budding or flowering. 

flowering

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

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

adj
  • Of a plant, that produces flowers. 

  • aflower, in bloom 

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