How many minutes does the entire Botox procedure take, from waiting for the anesthetic ointment to the treatment itself?

Lately, whenever I look in the mirror, the deep lines between my eyebrows seem to be getting worse. It makes me look so frowning and older, and I'm going crazy with stress. I decided I can't go on like this, so I made up my mind to book an appointment at Maypure this weekend to get a Botox treatment to reduce my frown lines.

I have an important, uncancellable business meeting scheduled immediately after my treatment on the same day, so I need to calculate the total time I will spend at the clinic in advance. I am curious about the approximate duration of the actual Botox procedure itself, starting from the time spent waiting in the waiting room with the anesthetic cream applied, to the doctor entering the room to precisely inject into the facial wrinkles. It would be very helpful for me to book the appointment if you could let me know if the entire process finishes very quickly. Please also let me know the duration of the injection itself.