above-board vs straightforward

above-board

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

adv
  • Honestly; openly. 

straightforward

adj
  • proceeding in a straight course or manner; not deviating 

  • easy, simple, uncomplicated, without difficulty 

  • direct; forthright; frank; sincere 

adv
  • In a straightforward manner; straightforwards; straightforwardly. 

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