This answer can differ from teacher to teacher. In my book, I made some time frame suggestions based on the amount of time you practice, type of strings you have, and the type of player you are. There are some strings that last longer than others, but that doesn’t have anything to do with string quality. Steel strings are more durable, but don’t sound as good as synthetic strings (Dominant, Obligato). The better the string (in general), the less time they last.
Take each factor into consideration below to come up with a time frame to replace your strings. Hope this helps!
Factor #1 – Practice Time
1 hour per week – Change strings once every 2 years
2 hours per week – Change strings once a year
3 hours per week – Change strings once every 9 months
4+ hours per week – Change strings once every 6 months
Factor #2 – Type of strings
Steel strings – Add 6-12 months to your time frame
Dominant strings – Add 3 months to your time frame
Obligato strings – Subtract 3 months from your time frame
Factor #3 – Style of player
Gentle Player (very light bow – wispy sound) – Add 3 months to your time frame
Aggressive (digs into strings – grittier sound) – Subtract 3 months from your time frame