As improvement is driven by you; your practice time, focus and diligence while practicing, and practicing the correct material ...
... I would suggest a second teach will have no positive effect, and possibly a negative effect, on your progression.
If you are only able to see your instructor once or twice a month ... that does nothing against your practice time. Take the time between lessons to focus on the one or two take-away points from your lesson.
2018 Cordoba Esteso Cedar