abet vs stonewall

abet

verb
  • To incite; to assist or encourage by aid or countenance in crime. 

  • To support, countenance, maintain, uphold, or aid (any good cause, opinion, or action); to maintain. 

stonewall

verb
  • To obstruct. 

  • To refuse to answer or cooperate, especially in supplying information. 

adj
  • Certain, definite. 

noun
  • An obstruction. 

  • An alcoholic drink popular in colonial America, consisting of apple cider (or sometimes applejack) mixed with rum (or sometimes gin or whisky). 

  • A refusal to cooperate. 

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