Yes it's once every month. They won't really will shirk you away if it's under 30 days. But it can't be more than once a month.
I understand individuals and families are allowed to make an appointment once every 30 days. However, I am not sure if more aid is given based on special circumstances. Please, feel free to stop by or call to confirm this and discuss your specific needs.
Thanks! Your answer is awaiting moderation.