Is there a way to change the intervals of the number labels on the dopesheet and graph views? For example, instead of showing 5,10,15 or 10,20,30, it shows 6,12,18 or 12,24,36?

Long-winded explanation of why I want to do this: I am working on a rhythm game where it is extremely important to be able to do halves and quarters of beats. I'm currently doing 30FPS, animating for 120bpm (adjusted in the runtime for the bpm of the actual music), so each beat is 15 frames in the editor. This makes it pretty much impossible to precisely do offbeats. I'd have to change the FPS to something else, and I'm thinking 48 because it's much more divisible and a nice number for FPS, and it'd be convenient to be able to quickly see where the beats are with the gridlines.