I do not understand something and maybe you can help me:

When I do laundry once every seven days, we usually have three loads of laundry

When I do laundry after eight days: we have four loads of laundry.

when I do laundry after twelve days: we have five loads of laundry.

I do not understand how waiting so long to do more laundry does not result in way more loads of laundry unless I decide to toss in extra stuff that only needs to be washed rarely like blankets.

Thoughts?