blacken vs opprobriate

blacken

verb
  • To defame or sully. 

  • To make dirty. 

  • To cook (meat or fish) by coating with pepper, etc., and quickly searing in a hot pan. 

  • To become black. 

  • To cause to be or become black. 

opprobriate

verb
  • To express opprobrium for or to view with opprobrium; to scorn. 

adj
  • Expressing opprobrium; disparaging. 

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