above-board vs properly

above-board

adv
  • Honestly; openly. 

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

properly

adv
  • Entirely; extremely; thoroughly. 

  • in a proper manner, appropriately, suitably; correctly, justifiably 

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