'How Long' in the Bible

And I heard one saint speaking, and another saint said unto that one who spoke, How long shall be the vision of the continual sacrifice and of the transgression that maketh desolate, to give both the sanctuary and the host to be trodden down under foot?

And he said to the man clothed in linen, who was above the waters of the river, How long is it to the end of these wonders?