The more time and effort that you dedicate to your Bikram Yoga practice, the more you will be able to enhance the quality of your overall health.
If a beginner practiced everyday for 2 months, he would be able to perform 85% of the postures correctly. Progress is rapid in the beginning and is best if you could practice everyday.
Of course, other priorities take time in our lives, so a minimum of 3 classes per week is recommended to realize the preventative, therapeautic, and healing powers of Bikram Yoga.