'During' in the Bible

These [two witnesses] have the power [from God] to shut up the sky, so that no rain will fall during the days of their prophesying [regarding judgment and salvation]; and they have power over the waters (seas, rivers) to turn them into blood, and to strike the earth with every [kind of] plague, as often as they wish.

And the beast was given a mouth (the power of speech), uttering great things and arrogant and blasphemous words, and he was given freedom and authority to act and to do as he pleased for forty-two months (three and a half years).