It is completely up to you how many sessions you have. Some clients come once or twice, making profound shifts and others come weekly or bi-monthly for a while until desired results are achieved.
In general, when your own self-guidance gets clouded, another pattern is coming to the surface to be released. Additional sessions can help with this process.
As stated above, I can give you an idea of how many sessions it might take to achieve your desired results before you book so you can decide if the investment is right for you.