What is spp?How do spp and gpp fit into periodization?

I thought charlie would periodize by doing 3 weeks of an accumulation phase,then a 3-1-3 cycle and then a maintaince phase.I know gpp is general physichal preperation but how would it and spp fit into charlies periodization scheme?Is gpp and spp a different way of periodizing?

Using your example, it roughly translates this way:

First 3 weeks = GPP
Next 7 weeks = SPP