I'm planning to get Botox for my frown lines and jaw muscles. Does the procedure take a long time?

Maybe it's because I have a habit of frowning unconsciously, but even though I'm still in my 30s, deep wrinkles are starting to form between my eyebrows. On top of that, I grind my teeth while sleeping, so my jaw muscles have developed really hard. Every time I look in the mirror, I look fierce and my face looks wide, so I've finally decided to try Botox, which is known as the "national procedure" for everyone. My friends are already getting it regularly—it seems like there isn't a single one who isn't—so I feel like I'm starting way too late. Still, I want to hold on tight before the wrinkles get too deep. However, since I'm a working professional, I absolutely cannot spare any time on weekdays, so I'm thinking of just stepping out during my lunch break to get the Botox. By the way, how long does the total procedure take, from arriving at the clinic, waiting, getting the anesthesia, and finishing the injection? Haha, I heard the injection itself only takes a minute, but I'm worried that if the topical anesthetic takes a long time, it might be tight to eat and get back within my one-hour lunch break. I heard there are places where they just apply an ice pack and give you the Botox right away, so I'm curious if the pain is bearable. I'm really looking forward to it because I heard your face shape definitely becomes slimmer after a month of square jaw Botox. I don't think there's any other procedure with this level of value for money considering the short treatment time. If any fellow office workers are out getting quick Botox during their lunch break, please share your tips on how long it takes! Wishing everyone a quick exit from work today!