It's a bit random, depends on where you are in Tesla's update plans.
I've just posted on another thread about my experience: First update arrived 9pm the night I got the car, second update arrived over the following night so I had two updates before I'd had the car 48 hours.
For most of this year I've been getting updates about once a month on Advanced so don't expect to get every version. I'm currently on 2021.24.5 which puts me seven releases away from the latest one showing on Teslascope.