fall away vs go from bad to worse

fall away

verb
  • To get worse. 

  • To cease to support a person or cause. 

  • To perish; to vanish; to be lost. 

  • To diminish in size, weight, or intensity. 

go from bad to worse

verb
  • to become even worse 

How often have the words fall away and go from bad to worse occurred in a corpus of books? (source: Google Ngram Viewer )