Hi Dsahala,
If you meant "subitizing," in general children will retain this ability at least up to the age of two and a half -- but as always, we should take note that each child develops at her own pace, so this may not be the case for your daughter.
However, since you've started pretty early with your quantity lessons I'm sure your daughter is having a blast subitizing her way through the lessons!
In case you haven't read through this yet, I would also like to suggest that you check out the Subitizing article at BrillBaby.com:
http://www.brillbaby.com/teaching-baby/math/perceiving-quantity-subitizing.phpI hope this helps!
Digg
