(For this question please assume that Paul considered himself a Christian and that he was the author of all 13 canonical Pauline letters.)
My question is: what terms (or phrases) did Paul use most frequently in referring to Christians? I am guessing he didn't call them "Christians."
Some possibilities (to give you an idea of what I mean) might be:
brothers
elect (of God)
believers
I would like the top 3 terms that he uses with some sort of figure indicating how often he used it relative to other terms.