above-board vs engaging

above-board

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

adv
  • Honestly; openly. 

engaging

adj
  • That engages the attention; engrossing, interesting; enthralling. 

  • Charming; attractive, especially of a manner or behaviour. 

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