This varies slightly from one course to the next, but generally we estimate around 3-4 hours of work per week are required to complete a module. The idea is that you spend about 20 minutes per day on your professional development.
However, it is up to you how much time you want to spend on a course. Most participants in our courses report spending between 2-3 hours per week, but some say they went really in depth and spent more hours than that.