above-board vs too

above-board

adv
  • Honestly; openly. 

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

too

adv
  • To a high degree, very. 

  • Used to contradict a negative assertion. 

  • To an excessive degree; over; more than enough. 

  • Also; in addition. 

  • Likewise. 

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