righteous vs undependable

righteous

adj
  • Justified morally. 

  • Free from sin or guilt. 

  • Moral and virtuous, to the point of sanctimony. 

  • Awesome; great. 

verb
  • To make righteous; specifically, to justify religiously, to absolve from sin. 

undependable

adj
  • Not dependable. 

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