The time it takes for a snake to shed from one shed to the next is irrelevant- snakes, like humans & other animals, can have growth spurts. Their diet & climate can also vary, which impacts their growth rate.
Sheds that occur too rapidly may actually signal that your snake has an injury/illness from which it's trying to heal/recover, since snakes do not simply grow new cells at just the site of the injury- their whole body is involved in the "make-over".
In general, younger snakes shed more frequently than older ones because they're growing faster, but all snakes shed (grow) their whole lives. I've personally kept some pretty old snakes that took a year to a year & a half between sheds.
Bluebell_1990- don't lose sleep over this- snakes shed when they need to, & not before.