above-board vs root and branch

above-board

adv

  • Honestly; openly. 

adj

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

root and branch

adv

  • Totally, completely. 

adj

  • Total, thorough, sweeping, complete, radical, drastic. 

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