KeyFrames Sampling Rate

[SyedShafiq]

Hello, As per the paper "Scalability in Perception for Autonomous Driving: Waymo Open Dataset", below is the following information.

Our dataset is organized into sequences, each 20 seconds
long with multiple sensors producing data sampled at 10Hz.

This means that every sequence will have 200 frames. My question is if all of these frames are keyframes with given ground truth annotations. What is the time delta between two consecutive keyframes?