It depends on how old they are and how quick they are growing. A young animal growing quickly is going to be shedding more often than a fully grown adult with little growing to do.
I was in Cali from July 26 to August 26 so I didn't weigh him the past several weeks(i left him in OK at a friends house), and don't have an exact date on his shed......but he was just under 5 months old when I first weighed him(hatched on Dec 28th). They start to shed less and less as they age.