expostulate vs persuade

expostulate

verb
  • To protest or remonstrate; to reason earnestly with a person on some impropriety of conduct. 

persuade

verb
  • To successfully convince (someone) to agree to, accept, or do something, usually through reasoning and verbal influence. 

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