above-board vs unquestioned

above-board

adj
  • In open sight; without trick, concealment, or deception. 

adv
  • Honestly; openly. 

unquestioned

adj
  • Accepted without question; indisputable 

  • Not subjected to an interrogation 

How often have the words above-board and unquestioned occurred in a corpus of books? (source: Google Ngram Viewer )