Little and often is the best way to learn and 5 sessions per week is ideal. For beginners and young children the session can be just 10 minutes.
As a rough guide:
Level | Amount of Practice |
Beginner | Five sessions of 10 minutes per week |
Grades 1 and 2 | Five sessions of 15 to 20 minutes per week |
Grades 3 and 4 | Five sessions of 20 to 30 minutes per week |
Grades 5 and 6 | Five sessions of 30 to 40 minutes per week |
Grades 7 and 8 | Five sessions of 40+ minutes per week |
These are very approximate times for pupils aiming to take grades where time is needed for all 4 elements of the exam.
Obviously this will vary enormously from time to time, but the grades will require approximately this amount of practice.