Since context obviously matters, consider the following.
Revelation 14:9 And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand,
10 The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb:
11 And the smoke of their torment ascendeth up for ever and ever: and they have no rest day nor night, who worship the beast and his image, and whosoever receiveth the mark of his name.
12 Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus.
This passage is often used in support of ECT in regards to humans. The first thing to notice though, it is only involving--If any man worship the beast and his image, and receive his mark in his forehead, or in his hand.
Take Cain for instance. I'm certain when he is judged at the great white throne judgment, he will be cast into the LOF. Is it because he was doing what is recorded in verse 9 above? Doesn't verses 10-11 tell us, that specifically involves those doing what is recorded in verse 9?
Maybe the solution is, none of this is even involving the lake of fire, it is involving the 7 vials of wrath being poured out on them. Notice what the 7th vial involves.
Revelation 16:17 And the seventh angel poured out his vial into the air; and there came a great voice out of the temple of heaven, from the throne, saying, It is done.
18 And there were voices, and thunders, and lightnings; and there was a great earthquake, such as was not since men were upon the earth, so mighty an earthquake, and so great.
19 And the great city was divided into three parts, and the cities of the nations fell: and great Babylon came in remembrance before God, to give unto her the cup of the wine of the fierceness of his wrath.
20 And every island fled away, and the mountains were not found.
21 And there fell upon men a great hail out of heaven, every stone about the weight of a talent: and men blasphemed God because of the plague of the hail; for the plague thereof was exceeding great.
Compare with the following in Ezekiel 38.
Ezekiel 38:20 So that the fishes of the sea, and the fowls of the heaven, and the beasts of the field, and all creeping things that creep upon the earth, and all the men that are upon the face of the earth, shall shake at my presence, and the mountains shall be thrown down, and the steep places shall fall, and every wall shall fall to the ground.
This verse apparently records the great earthquake meant in Revelation 16:18.
Ezekiel 38:22 And I will plead against him with pestilence and with blood; and I will rain upon him, and upon his bands, and upon the many people that are with him, an overflowing rain, and great hailstones, fire, and brimstone.
This verse apparently records the great hailstones meant in Revelation 16:21, and also apparently records the fire and brimstone meant in Revelation 14:10.
Regardless how much time these 7 vials of wrath involve, imagine them being poured out on you one after another and then you still being able to find rest day and night. No one could possibly be finding rest day and night if they are being plagued with the last 7 vials of wrath. The opposite would be true, they would be finding no rest day and night.