abet vs throw a monkey wrench into

abet

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

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

throw a monkey wrench into

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