Read the following dialogue then answer the question!

Tony: We have been waiting nearly 2 quarters of an hour.

Iwan: Yes, I think the bus will never come again.

Tony: Would it be an idea to walk?

Iwan: Yes, it's a good idea.

Tony: Has the new restaurant in this area opened today?

Iwan: It has opened yesterday already. My friend told me it has a new and delicious menu.

Tony: Why don't we eat there?

Iwan: It is a wonderful idea.

How long have Tony and Iwan waited?