QUICK QUESTION ABOUT RPG MAKER 2K3 ANIMATION FRAMES.

Probably 0.05 (1 / 20) or 0.0667 (1 / 15) seconds. 2k3 runs at either 30 or 60 (most likely: 60) frames per second and battle animations are probably a factor of that so it'll be at 10, 15, 30, or 60 frames per second. Probably not lower than 10 though as lower than that will really make animations look jumpy. If you know the frames per second of battle animations you can calculate the seconds per frame just by inverting the FPS. Read: 1 / FPS.

There was a thread about the FPS of battle animations here but nobody actually posted a hard answer, just the means of calculating it.

tl;dr: Make a long animation, 240 frames or so, and see how long it takes to complete. Divide the result by the number of frames used and you'll have a good estimate. Rolling the result to the nearest 1 / a factor of 60 will give you the most accurate result.