bettermost vs excellent

bettermost

adj
  • best, superior 

excellent

adj
  • Of higher or the highest quality; splendid. 

  • Having excelled, having surpassed. 

  • Superior in kind or degree, irrespective of moral quality. 

  • Exceptionally good of its kind. 

How often have the words bettermost and excellent occurred in a corpus of books? (source: Google Ngram Viewer )