above-board vs artless

above-board

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

adv
  • Honestly; openly. 

artless

adj
  • Having or displaying no guile, cunning, or deceit. 

  • Free of artificiality; natural. 

  • Poorly made or done; crude. 

  • Lacking art, knowledge, or skill; uncultured and ignorant. 

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