above-board vs truly

above-board

adv
  • Honestly; openly. 

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

truly

adv
  • Honestly, genuinely, in fact, really. 

  • In accordance with the facts; truthfully, accurately. 

  • Very. 

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