piano vs softly

piano

adv
  • softly, as a musical direction (abbreviated to p. in sheet music) 

adj
  • Gentle, soft, subdued. 

  • Soft, quiet. 

verb
  • To play the piano. 

  • To move (the fingers) up and down on, similar to the motions of a pianist playing the piano. 

  • To become softer and less intense. 

  • To equip with a piano. 

noun
  • a percussive keyboard musical instrument, usually ranging over seven octaves, with white and black colored keys, played by pressing these keys, causing hammers to strike strings 

softly

adv
  • In a soft manner; gently. 

  • Not loudly; nearly inaudibly. 

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