Just throwing out a curious question, whats with the multiples of 12?
Paganini wrote 24 caprices
Chopin wrote 24 preludes and 12+12 etudes
Schumann wrote 12 Symphonic Etudes
Liszt wrote 12 transcendental etudes
Debussy wrote 12+12 preludes and 12 etudes
Scriabin wrote a group of 12 etudes and a group of 24 preludes
In each book of Bach's Well-tempered Clavier, theres 24 preludes and fugues