How many times do you feed your toddler milk in a day?

Hi mommies! My son is 15 months. He has been drinking milk twice daily once in the morning and at night. He has his solid food + snacks in between the day till evening. How many times do you mommies feed your toddlers milk in a day? I look through the milk tin as well and the serving suggestion is twice daily. Am wondering about this as my mil keep asking me to increase his milk intake in a day..