I thought I'd comment on my running schedule. I'm currently running 3 times per week. My goal is to run Monday, Wednesday, and Saturday. If I don't run on Monday, I aim for Tuesday, Thursday, and Saturday. If I don't run Monday or Tuesday, I drop to two days per week and run Wednesday and Saturday or Thursday and Saturday.
When I was younger and running marathons, I ran five days per week. Four years ago when I ran the Great Salt Lake Half Marathon, I ran four days per week. I may eventually bring in another day, but it all depends on my health and how I feel.