Flash MX 2004.
frame.motionTweenRotateTimes
Property; an integer that specifies the number of times the tweened element rotates between the starting keyframe and the next keyframe.
The following example rotates the element in this frame counter-clockwise three times by the time it reaches the next keyframe:
fl.getDocumentDOM().getTimeline().layers[0].frames[0].motionTweenRotate = "counter- clockwise";
fl.getDocumentDOM().getTimeline().layers[0].frames[0].motionTweenRotateTimes = 3;