gild the lily vs go overboard

gild the lily

verb
  • To embellish or improve something unnecessarily. 

  • To add superfluous attributes to something. 

go overboard

verb
  • To go too far; to exceed reasonable bounds. 

  • To fall out of a vessel. 

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