Don't wait two weeks ! Correct timing is the time it takes for the workers to CAP a queen cell. Based upon normal times the bees will start with a newly hatched larva - usually this is at the 3 day mark. Then they continue till day 8 and cap the cell. So on day 9 of the cycle which is normally 6 days after you made them queenless you should find capped queen cells in your hive. Go in then check to see how many you have. CULL out the ones you need by day 14 of the cycle as timing can vary on the cells by up to a day at times.