reproof vs tu quoque

reproof

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

verb
  • To proof again. 

tu quoque

noun
  • An argument whereby an accusation or insult is turned back on the accuser; same to you 

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