let me play the border agent for a moment...
(1) what are the purposes for your frequent visits to the US? (July, December, March)
(2) where do you work and how much do you make in Canada?
(3) do you rent or own your home? if so, what's the monthly rent or mortgage payment?
(4) why are you traveling with just your daughter? where is the father? do you have sole custody of your daughter? if not, do you have permission from the father to take her out of Canada?
(5)