How long does a double chin lifting procedure take?

My weight hasn't changed, but I'm worried because my double chin looks severe, possibly due to sagging skin under my chin as I get older. It bothers me when viewed from the front, but it causes me so much stress when my profile is photographed that I am looking for a clinic to get a proper double chin lift. Since I work, I want to make a quick trip after work on a weekday or get it done quickly on a Saturday morning. Excluding the time for anesthesia and waiting, approximately how many minutes does the actual procedure take? I know it may vary by clinic, but I'm curious about the average time. As a working professional, I have to schedule everything tightly, so if anyone has recently had a double chin lift, I would appreciate it if you could give me some tips on how much time I should allocate from the consultation to leaving the clinic.