Example sentences of "over a [adj] period [prep] a " in BNC.

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1 Those few casual workers in the catering industry who do seem to work on a more or less continuous , almost full-time basis over a long period for a single organisation ( the plaintiffs in the oft-cited " O'Kelly case " ) , tend to possess skills which that organisation , and indeed other potential employers , value .
2 Conversely , some econometricians have argued that it is more cost effective to use a ‘ drip ’ system , advertising more or less continuously over a long period at a very low weight .
3 Of this , SDR49,500,000 would be available over the next 12 months under a standby arrangement and SDR81,500,000 would be available over a three-year period under an ESAF arrangement .
4 Bush did not indicate how the changes , which were to be phased in over a five-year period at a cost of up to $100,000 million , would be financed .
5 Empirical evidence on aggregate investment tends to confirm that it is indeed inversely related to the rate of interest , but most evidence suggests that the relationship is a fairly weak one — for example , M. Evans estimated ( for United States data ) that a 25 per cent fall in interest rates would cause net investment to rise by 5–10 per cent over a two-year period after a one-year lag .
6 Under the agreement , government and parastatal loans were to be repaid over a 20-year period with a three-year grace period , while commercial debts would become payable over 15 years with an eight-year grace period .
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