Assuming you know how simhub works after that many hours you should know you can test all settings beforehand, so just try different frequencies and set up the frequencies and percentages to your liking. It’s a personal preference and it probably depends on your bass-shaker and amplifier as well, not that nobody knows how simhub works…

https://www.reddit.com/r/simracing/comments/zej98d/simhub_shakers_frequency_settings/