If it is real young you could do five days but if it's several months I would start weekly.
Also
If your feeding it smaller meals five days would be fine but if your going with a good size feeder for your snakes size I would do weekly.

If you know your snakes weight and tell us what size mouse you are feeding I could answer you better, I just answered the best I could with what I had. As with many things snake related the answer is"it depends" on the variables.