A1 vs bravura

A1

noun
  • Under the International Union of Railways ("UIC") classification system, a steam locomotive that has two coupled driving wheels followed by two trailing wheels, with no leading wheels; also called an 0-2-2. 

adj
  • First-class. (Compare A 2 and A 3, which are inferior grades.) 

  • In good health. 

  • In excellent or top condition. 

bravura

adj
  • Overly showy; ostentatious. 

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

  • A display of daring. 

How often have the words A1 and bravura occurred in a corpus of books? (source: Google Ngram Viewer )