disapprobation vs reproof

disapprobation

noun
  • An act or expression of condemnation or disapproval, especially on moral grounds. 

reproof

noun
  • An act or instance of reproving or of reprobating; a rebuke, a reproach, an admonition. 

verb
  • To proof again. 

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