advise vs impugn

advise

verb
  • To give advice to; to offer an opinion to, as worthy or expedient to be followed. 

  • To give information or notice to; to inform or counsel; — with of before the thing communicated. 

  • To consider, to deliberate. 

  • To recommend; to offer as advice. 

  • To deliver judgment after a case has been reserved for further consideration. 

impugn

verb
  • To verbally assault, especially to argue against an opinion, motive, or action; to question the truth or validity of. 

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