above-board vs unsuspicious

above-board

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

adv
  • Honestly; openly. 

unsuspicious

adj
  • Not suspicious; not suspecting, unaware (of something). 

  • Not arousing suspicion. 

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