So what it seems to be doing is that it will count up the consecutive blank frames, but as soon as a new frame containing some different pixels appears, the counter resets to 0.04166666666. Since most of the animation is on twos this is why it goes from 0.0416666666 to .08333333, then resets back to 0.0416666666 on the next new frame. When the character holds a pose for multiple frames though, the counter ticks up each frame until reseting again when the pose changes.
What I’m trying to do is instead of the counter ticking up on consecutive frames where the image remains static (and then reseting on a new pose), the counter would remain static so long as the pose is static, and ticks up only when the pose changes (ie. the difference matte displays new information).