How long does it take to bridge from ETH to Arbitrum?

I'm curious to know, how long does the process of bridging from Ethereum (ETH) to Arbitrum typically take? Is it an instantaneous transaction, or does it involve a waiting period? Additionally, are there any factors that can affect the bridging time, such as network congestion or the amount being transferred? Understanding the timeline for this process is crucial for those looking to utilize the benefits of Arbitrum's scalability and low fees.