How long does it take to unstake stETH?

Could you please clarify for me how long the process of unstaking stETH typically takes? I'm interested in understanding the timeframe involved, as I'm considering staking my own Ether tokens. Is it a matter of minutes, hours, days, or longer? Are there any variables that might affect the duration, such as network congestion or other factors? I'd appreciate any insights you can provide on this matter.