Is the conduct of daughters who visit their father two or three times a month, while regularly visiting their mother, considered an act of devotion to him?

It is not obligatory for the dutifulness towards the father to be equal to the dutifulness towards the mother, and a disparity in the degree or manner of dutifulness to each of them does not cause harm. The criterion for dutifulness and maintaining ties of kinship is custom. Benevolence towards relatives can be through money, service, visits, greetings, and other means, depending on the circumstances of the one who maintains ties and the one to whom ties are maintained. If the daughters uphold ties of kinship through visits or otherwise, according to their ability and capacity, then they have fulfilled their obligation, especially since they are under the care of their husbands and have duties towards their husbands, homes, and children.