Each one would have a day of low to high-intensity, low-impact cross training in between... from one workout to the next:
Slow Long Run
Anaerobic Sprints
Track Intervals
Tempo Run
Progressive Long Run
Unstructured Fartlek
Steady State Run
... The theory is this could be a 14 day cycle. Each one could be done twice a month with 1 day of active recovery in between and necessary tweaks needed per an individuals strengths or weaknesses...
Thanks for your logical input in advancement.