'How Long' in the Bible

Upon this I heard one of the saints speaking, which saint said unto one that asked this question, "How long shall this vision of the daily sacrifice and of the wasting abomination endure: that the Sanctuary and the power shall so be trodden under foot?"

And one of them said, unto him which was clothed in linen and stood above upon the waters of the flood, "How long shall it be to the end of these wondrous works?"