On the Webpage Card it should provide a default setting for refresh rate. The example in the card info shows a weather radar image, but without update, it’s rather useless, as outdating to quickly.
I tried to follow an example from the forum without success. Maybe PEBKAS, but I couldn’t find any solution. And think this should be a default option in the webpage card, not something for which I must work around through a local webpage that does nothing but refresh an iframe within an iframe?