How long does it take to unstake ETH on Lido?

Could you please tell me, approximately how long does it require to unstake ETH on the Lido platform? I'm interested in understanding the typical time frame involved in this process, as I'm considering staking my ETH but also want to be aware of the potential withdrawal timeline. Is there a set period of time that's usually required, or does it vary based on certain factors? Additionally, would you mind elaborating on any potential fees or penalties associated with unstaking ETH on Lido? Thank you for your assistance in clarifying this matter.