above-board vs childlike

above-board

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

adv
  • Honestly; openly. 

childlike

adj
  • Innocent and trustful; credulous; artless. 

  • Of, like, or suitable for a child. 

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