From the " Frédéric Chopin – a centenary focus" article at
"[Chopin is] the only great composer whose every work involves the piano – no symphonies, operas or choral works and only a handful of compositions that involve other instruments. He wrote just under 200 works; 169 of these are for solo piano."
200 - 169 = 31.
That's a very large number of fingers for a "handful" :-)
"Louder! Louder! I can still hear the singers!"
- Richard Strauss to the orchestra, at a rehearsal.