complain vs fly in the face of

complain

verb
  • To make a formal accusation or bring a formal charge. 

  • To creak or squeak, as a timber or wheel. 

  • To express feelings of pain, dissatisfaction, or resentment. 

fly in the face of

verb
  • To act in a manner highly contrary to; to counteract or contradict. 

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