The rapture is at the coming of Christ, the 2nd coming.
There is no 3rd coming.
It is not a spiritual coming it is bodily as every eye shall see Him coming on the clouds of heaven.
It means the doom of the wicked and the salvation of the righteous in the Lord.
The Earthly Sanctuary - Then indeed, even the first covenant had ordinances of divine service and the earthly sanctuary. For a tabernacle was prepared: the first part, in which was the lampstand, the table, and the showbread, which is called the sanctuary; and behind the second veil, the part of...
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27 And as it is appointed for men to die once, but after this the judgment, 28 so Christ was offered once to bear the sins of many. To those who eagerly wait for Him He will appear a second time, apart from sin, for salvation.
'appear a second time apart from sin for salvation.'
First time Christ came, was as a sacrifice for sin.
Second time is for judgement of the wicked, and our salvation from this evil age.
Only believers eagerly wait for Him.