間 => while; during; between ~ N4
間に => while; during~ something happened N4
瞬間 => At the very moment N3
Short period of time
[間「あいだ」]/[間「あいだ」]に => During A, During A (before A is finished/over) N2
Time, Situation
~ といっても間違いない => although I say; although one might say ~ it doesn't matter ... N1
Explain