Absolutely depends on services requested and rendered. The information is based on a Google algorithm through location services. However, I know if I'm getting my hair dyed darker along with a cut, that's easily 2-3 hours. If I need an eyebrow wax it's 15-30 minutes. Personal note, kind of weird your posting on your girlfriend behalf. Maybe she should voice her own concerns.
It's just an average.
Thanks! Your answer is awaiting moderation.