boomingly vs fortissimo

boomingly

adv

  • In a booming manner; loudly. 

fortissimo

adv

  • Indicating that the piece is played very loud. 

noun

  • The dynamic sign indicating that the piece should be played fortissimo. Abbreviation: ff. 

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