Greetings.
Depends on a students. I can say this, don't look at progress this way, it will only slow you down. Just practice, and practice legibly. Repeating excercises for 8 hours the same way is not going to improve, playing an excercise correctly one hour will improve greatly. I learned this and I practice around 4 hours on an average day and I try to make use of time the best way I can. I practice the first 2 Moszkowski eudes, Impromptu no4 by Schubert, Czerny, a lot of technical excercises(don't listen to others who say they don't work), Beethoven's Rage over a lost penny. These are my current working pieces. My repertoire consists of Bach preludes, invention, Mozart's "Ah, vous direz-je maman" variations, Alla turca, many Schumann pieces, Le Coucou, and more.
I love to practice.
