24 frames a second
2460seconds=1440
1,440 frames a minute
1,440120minutes=172,800
I Think

a 2 hour animation at 24 frames a second would take 172,800 drawings.I think.might want to check my math.
not sure about where the the million n half drawings came from.
maybe there counting every different thing in a frame or ruff drafts.
just don't know.

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it's never to late to become a Artist ;)

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The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance