For years I was riding 5-6 days a week. The only reason I'm not doing that right now is because it's winter. I would ride short distances during the week (anywhere from about 20-80 km) and long distances on the weekend (metric centuries, centuries ... and longer, much longer).

One of my favourite things to do with a long weekend was to ride a century (100 miles) on Saturday, another century on Sunday, and then to cool down with a metric century (100 km) on the Monday.

Even though my fitness level has dropped way off for medical reasons, I still managed a variation on that about a month ago where I did a metric on Saturday, a metric on Sunday and a 50 km ride on the Monday.