Sungs, I don't think you've been replied to because your question is essentially impossible to answer. Every building is different to the extent that it's impossible to say even how many weeks per floor above, or below. Building methods vary, materials vary, finish qualities vary, size of workforce varies, unexpected challenges can occur (building trade strikes, underground water, etc.), it goes on an on.
Despite all of that, every developer has a plan for each building, and that make occupancy date promises based on that. of course, the law allows them to extend the move in dates a number of times, as things rarely go as smootly as promised.
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