Is it obligatory for me to divide my time between my parents after their divorce, given that my father visits us one to three times a week, and I do not want to fall short in fulfilling his rights, as he lives alone?

There is no obligation to divide time equally between parents. Rather, the duty is to honor them and treat them with kindness by visiting them, caring for them, serving them, and spending on them when needed. This should be done for each of them according to their need, for honoring parents is a broad door that encompasses various forms of kindness and differs according to their circumstances. The aim is for the child to treat their parents kindly in a way that benefits them.