I've just calculated that if a move has 10.91% of usage or higher, then it appears in at least one Pokemon in at least half of the teams that you'll face.
For Standard, the moves that qualify for this definition are Earthquake, Thunderbolt and Stealth Rock.
For UU, the moves are Earthquake, Stealth Rock and Substitute.
For Uber, the moves are Thunder, Ice Beam, Earthquake, Surf, Stealth Rock and Outrage.
For Suspect, the moves are Earthquake, Surf, Thunderbolt, Stealth Rock and Substitute.
Earthquake and Stealth Rock are the only two moves that qualify for this definition in all metagames.
For all your Pokemon needs (and more!) including: the Defensive EVs
applet, the Probabilities of Breeding IVs in Pokemon
applet, and the Ratings of Pokemon Base Stats
applet (now Version 2.0!)
. And also the IV to PID