The maximum frame rate for recording in slow motion varies depending on the camera or device being used. Many high-end cameras are capable of recording slow-motion footage at frame rates ranging from 120 frames per second (fps) to 1000 fps or even higher. However, the specific maximum frame rate will depend on the camera's specifications and capabilities. It is important to consult the manufacturer's documentation or specifications for the exact maximum frame rate for slow-motion recording for a specific camera or device.