It’s really hard to tell exactly how much time this should take as it depends on your computer configuration. Once the installer has downloaded all the needed files, it needs to install Chrome now. But if your internet speed is slower, then you might need to wait up to a few minutes for the download to be completed
With an average internet speed of about 130 Mbps, the download should take less than 10 seconds. So it first needs to download about 90 MBs or 720 Mbps. The Chrome installer will help you to download Chrome and install it.