However, a class at least once a week is beneficial to 99% of our students. Voice classes are usually divided into 30-, 45- and 60-minute sessions. Normally, students benefit from more than one 60-minute class each week to work in-depth on their voice and watch a song at the same time. This gives the teacher, and you as a student, an idea of how well you are practicing and progressing.
The standard frequency of classes is one class per week. Some people want to do more right from the start and others want to do less than that. For most people, I recommend consistent weekly classes as optimal if possible for them. In my experience, people who plan to do two or more lessons a week find that they don't actually progress much faster.
It takes time for the body to develop new habits, and singing is a rather sophisticated process for the body, since many things have to align. That said, you can speed up this process by simply practicing more. The 3-year rule for me is a singer who practices 1 hour a day at least 5 days a week. If you practice two hours a day, you can speed up this process tremendously.
It all depends on how much you want it and your willingness to spend time. The ideal situation is that you find a good teacher in person and take weekly classes with him, at least until you build a good foundation for your voice. Chris Glyde is a vocal coach based in Rochester, New York, who is constantly helping his students push their voices to new heights. Just as some people learned to walk faster than others or learned to speak before, people progress differently with the voice.
The only thing that a voice teacher can truly offer a student is to give the student a solid framework to train themselves to acquire skills to operate their vocal mechanism as efficiently as possible, as well as musical knowledge and artistic understanding and appreciation of singing and performance. The overall goal of any aspiring singer should be a healthy and balanced voice that lasts the rest of your life. If you are looking to go beyond the basics and learn to distort the voice, extend the voice from your chest as much as possible, etc. I argue that it is NOT advisable to take daily voice classes, and that the highest frequency should be twice a week.
Playing with your voice is fascinating, but it can also be dangerous if you don't know what you're doing. As for the time it takes to see results, it depends on a number of factors: what your goals are, where your voice is right now, and how dedicated you are to making the changes you need to make to achieve your goals. Most people see results in their voice in the first lesson. %26 hears a difference in their voice almost immediately.