reproof vs thanks

reproof

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

verb
  • To proof again. 

thanks

intj
  • Used to express appreciation or gratitude. 

noun
  • An expression of gratitude. 

  • Grateful feelings or thoughts. 

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