‘And the king of the north will return, and will raise a multitude greater than the former, and he will come on at the end of the times, even years, with a great army and much substance.'
Kings like Antiochus III lived to fight and conquer. Thus on his defeat he returned to his land and gathered another, even larger army, and sought victories in other directions, to the east and the north. In this he was successful and his army grew large and powerful and became well armed with weapons of war (‘much substance'). So after some years, having made an alliance with Philip of Macedon, he renewed his attack on Egypt.
‘At the end of the times, even years.' This does not mean that ‘times' always means years. It was, however, true in this case. (Had it always meant years it would not have had to be explained).