What are the most common types in each tier?

Question

Example: Uber Pokemon. Common types: Psychic, Dragon

Answer 1

Well

Uber: Dragon and Psychic by FAR
OU: Psychic, Dragon, and Steel types are by far the most common. Fighting types are pretty common too. Water and Fire types are also rather common.
BL/UU: Fighting, Water, and Ground types are everywhere. Flying, Electric, and Steel types are also pretty frequent.
RU: Bug, Flying, and Rock Types, Water and Grass are pretty common too.
NU: Bug, Grass, Ice, Normal, and Water are the ones around here, pretty much the ones that are are under-powered.

Comments

What does OU, BL/UU, RU, and NU???? This is confusing!!!

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OU= OverUsed / UU= UnderUsed / RU= RarelyUsed / NU= NeverUsed
Thoses are the ones, I think.

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Okay. Thanks.