above-board vs obviously

above-board

adv
  • Honestly; openly. 

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

obviously

adv
  • In an obvious or clearly apparent manner. 

  • Used as a filler word, or to introduce information even when not obvious. 

  • She was in floods of tears and obviously very upset. 

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