above-board vs trusty

above-board

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

adv
  • Honestly; openly. 

trusty

adj
  • Reliable or trustworthy. 

noun
  • A trusted person, especially a prisoner who has been granted special privileges. 

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