After going to the birthing center at 20w because I hadn't felty little one move much after she'd been very active, the nurse said I was lucky to feel her so early but that some women don't feel the baby until 24w :) so although you may feel your baby every now and again, there isn't a set amount at 16w.
I didn't feel mine until 20w and didn't start counting his kicks until 28w. Your still early so don't stress it. You will feel them here and there but nothing to worry if it's not all day everyday yet
Baby movement usually isn't consistent that early on some moms feel it earlier some feel it later .