new dawn vs rejuvenescence

new dawn

noun
  • A new beginning; a fresh start; an important, promising turning point. 

rejuvenescence

noun
  • A renewal of youthful characteristics or vitality. 

  • The escape of the protoplasm of a cell and its conversion into a cell of a different character, as in certain algae. 

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