To normalize roling shutter times from different frame rates, the "ratio" metric is used. Ratio is the rolling shutter divided by the frame time. For example, a 10ms rolling shutter time at 24 fps has a ratio of 0.42. That means the last scan line is exposed 42% of the total exposure time after the first scan line.
Using ratio normalizes across frame rates. For example, a rolling shutter of 8.3ms is a short amount of time, but if shot 120 fps and slowed to 24fps, it will display the same amount of skew per frame as 41.7ms of rolling shutter at 24 fps. They share the ratio of 1.0. On the other hand, since slow motion moves slower, higher ratios are often acceptable since visual skew also depends on how fast the camera and subject are moving. Use your judgment about which metric is useful for you.
Entries in green have a ratio of less than 0.25. Entries in red have a ratio of greater than 0.6.
If frame rate is unknown, 30.0 fps is assumed.