How does the chapel work? This is the only Feature Card that has one arrow and not the => sign.

Thanks

Can I do this multiple times in a round?

Yes. Since you don't need workers to do the discard, you can do this up to three times during the game(or even during round in this case) since VP token limit on a card is three VP tokens. Once you have done this three times and you have three 1 VP tokens on the card, you cannot use the ability anymore at any point the rest of the game.