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Depends on the language.
Lua: 2 weeks
PHP: about 4 months
CSS: 2 hours
Java: 2 weeks
C++/#: 2 months
Basic Unrealscripting: 3 weeks
Only important ones I can come up with right now.

C++ - 2 months, that's the biggest BS story I've ever read. I bet you wouldn't even know what smart pointers are. Lots of these timelines are unrealistic.