Hi and welcome. Yes, it can be normal for a chameleon at that age to shed infrequently. When young and growing quickly, they shed their entire bodies super quickly and often. As their growth slows and they become closer to adult, the shedding is less frequent and often done body part by body part. Making sure all aspects of your husbandry are as correct as possible is the best way to ensure your chameleon is shedding and growing properly. Also, keep in mind that chameleons are dry shedders.