above-board vs unstudied

above-board

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

adv
  • Honestly; openly. 

unstudied

adj
  • Free of artifice or cunning; innocent, spontaneous and unaffected. 

  • Not gained by study. 

  • Not studied. 

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