Occasional Eldercare sitter needed

I need someone to sit with my mother on an occasional basis while I take care of business or time with my children. Some weeks it could be 4 to 5 hours, some weeks it could be 10 to 12 hours. In most instances feeding and medication would not be required, I would have taken care of that before I left. My mother is still independent, but is 91 qnd getsd shaky, and afraid when alone. Most times would be during the day, in a few instances when I need to do something with my children it would be at night between 6 and midnight.