Hey, everyone!

A couple of questions that have been in my mind for a while: how often do you practice and what kind of exercises you do while practicing?

The reason why I'm asking this is because I mainly play the violin for a hobby, but I'm curious of how it works for people who actually work in that area... or even study in music conservatories. How long do they practice per day? What kind of tuning/bow/speed/changing position/vibrato exercises do they work on? What is, in your opinion, the best practice? What works for you? Playing the same song over and over again? Or changing the songs frequently so you won't get tired of it? Do you use a specific method (Suzuki, Sassmanhaus, Sevcik etc.)? Do you arbitrarily choose a song to play according to your own tastes regardless of the difficulty or do you do a careful research to see which song is more appropriate for your current ability level?

Thanks in advance!