And 25 fps! Australia, New Zealand, the UK, and western Europe use the 25 fps PAL TV standard. So most of my animation has been done at 25 fps. Half of that is 12.5, which is like shooting on twos, and it is an acceptable frame rate.
I've done a couple of things (creature work for indie feature films) at 24 fps, the international standard for film ever since the Talkies came in. Feature films shot digitally still use that rate. Half that is 12 fps, so animators shooting on twos for film would have 12 moves per second.