gild the lily vs rejuvenate

gild the lily

verb
  • To embellish or improve something unnecessarily. 

  • To add superfluous attributes to something. 

rejuvenate

verb
  • To give new energy or vigour to; to revitalise. 

  • To render young again. 

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