Josh went to CIBC for a mortgage and borrowed $$300,000.$ He was incredibly disappointed to see how high$-$interest rates were and had no choice but to lock in at a rate of $4\%$ compounded semi$-$annually with amortization over $25$ years. Since his pay is deposited at the end of each month, Josh thought it best to time the mortgage payments with the same monthly end date. He is$,$ however, wondering how many years he would have saved if instead he had signed up for accelerated weekly payments.