The Doctrine of Election in a Nutshell: "God chooses the individuals He will save."
Does this tell us whether the election is corporate or individual? Yes, our election for salvation is individual.
Does this tell us when God chooses us individually? No. But 2 Thessalonians 2:13 tells us God uses our faith in the truth to make His Election, thus individual election occurs not before creation, but during our lifetime after God credits our faith as righteous faith.
2 Thessalonians 2:13 (NET)
But we ought to thank God always for you, brothers and sisters loved by the Lord, because God chose you from the beginning for salvation through sanctification by the Spirit and faith in the truth.
Does this tell us whether the election is corporate or individual? Yes, our election for salvation is individual.
Does this tell us when God chooses us individually? No. But 2 Thessalonians 2:13 tells us God uses our faith in the truth to make His Election, thus individual election occurs not before creation, but during our lifetime after God credits our faith as righteous faith.
2 Thessalonians 2:13 (NET)
But we ought to thank God always for you, brothers and sisters loved by the Lord, because God chose you from the beginning for salvation through sanctification by the Spirit and faith in the truth.