For video games, I think played time is the general phrase to say how much time someone has spent on playing a game. For example, player A has accumulated 2000 hours of played time. For pilot, I think it's flight time. For example, commercial pilot requires 4 months of flight time to obtain a license. What about musicians? What is a short concise noun to describe the amount of time someone has spent on deliberately practicing an instrument?
I considered played time because musicians typically say "I play piano" or "I play guitar". What about vocalists? They don't say "I play voice". Is practiced time an appropriate choice here? Thank you