I'm happy you've boiled your recharging needs down to a science but none of this compares with long contiguous periods of unstructured time you can choose to use as you wish. Three months off every decade? Really?
As a leader, I will fight against it every time it gets proposed.
If they push back you can literally say to the manager "You told me that 6 weeks was normal"
Can you tell me more concretely what you're thinking? How do you define "long"? And, what is it about my list (despite it's prescriptive structure) that makes the time usage not "unstructured" ?