Patterns of Uhmmm

Patterns of Uhmmm https://youtu.be/anSjZS63T7s There were a couple of posts recently about the use of 'Um' as a filler word. Those of us who use 'Um' occasionally to help with speech might find this interesting. People who don't stutter use 'Um' regularly. There's a lot of maths which goes way over my head in this video but I wonder how different the rate of 'Um' would be for people who stutter.