Had a supervisor once that said “um” and “uh” a lot. One morning at the morning brief, I noticed one of my fellow technicians making marks on a piece of paper. After the meeting (15 minutes) I asked her what she was doing. She showed me that she made a mark every time he said “um”, “er”, or “uh”. She had 400 marks. It was astounding, but probably true. He would say sentences like “We, uh, want to, um, do, uh, uh, a better job, er, at this, um task.” Picture that for 15 minutes.