above-board vs irreprehensible

above-board

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

adv
  • Honestly; openly. 

irreprehensible

adj
  • not reprehensible, blameless, without blame; innocent 

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