bravura vs rueful

bravura

adj
  • Overly showy; ostentatious. 

noun
  • A highly technical or difficult piece, usually written for effect. 

  • A display of daring. 

rueful

adj
  • Bad; woeful; deplorable. 

  • Inspiring pity or compassion. 

  • Causing, feeling, or expressing regret or sorrow, especially in a wry or humorous way. 

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