above-board vs downright

above-board

adv
  • Honestly; openly. 

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

downright

adv
  • Really; actually; quite 

adj
  • Directly to the point; plain 

  • Using plain direct language; accustomed to express opinions directly and bluntly; blunt. 

  • Complete; absolute 

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