This isn't “scripting” it with some type of an Array increment pattern, but i would probably just move towards “flow” for this.

UnwrapCurve your arc
Array extent count your dash
Type out text
Flow to arc

[Edit] Haven't tested yet. You may have to do some type of 360 incremental rotation on the text, so it remains vertically aligned as it rotates around the arc. I think there is a plugin that can do this as a pre flow op on typed text.