A sentence from こころ - 三話
それから中二日おいてちょうど三日目の午後だったと思う。
Due to 中二日, I'm uncertain about timeframe in this sentence. Based on what I know, 中二日 means a third business day. Does it mean
After that, three days have passed and it was afternoon of the third day.
Am I wrong?
Also, is おいて here doesn't mean 居る but 於いて which means で?