The main thing about a stutter is that you cannot put a time limit it on it and if you do, chances are it will only make it worse. In my experience, there are going to be days where it’s basically nonexistent and other days where it’s all the way out and depending on the pressure put in the situation, anxiety is a leading factor that can decrease fluency. There is not going to be one way to deal with all situations unfortunately, and the person is not going to be able to control it most of the time. Do you have any examples of situations and time constraints?