How long does it take to withdraw cryptocurrency from Kraken?

Could you please elaborate on the estimated time frame for withdrawing cryptocurrency from Kraken? I'm particularly interested in understanding the various factors that might affect the withdrawal process and how they contribute to the overall duration. Is there a standard time period for withdrawals, or does it vary depending on the type of cryptocurrency or the volume of transactions? Additionally, are there any known delays or issues that could potentially prolong the withdrawal process? I'd appreciate it if you could provide a detailed breakdown of the withdrawal process, including any potential delays or exceptions to the usual time frame.