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

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1 In 1923 the USA and Britain reached an agreement for repayment of debts over a 62-year period at 3.3% interest .
2 The giant ground sloths and armadillos of the past were clearly South American in character , showing that this continent had been populated by unique families of animals over a vast period of time .
3 It will be difficult or impossible to establish a course of dealing on the basis of a small number of transactions over a long period .
4 Sales representative organized the promotion and personally demonstrated the production of chapattis to thousands of visitors over a five-day period .
5 The Beveridge Report advocated the payment of old-age pensions on an actuarial basis , which would have meant the building up of contributions over a twenty-year period .
6 Rumen boluses designed for the slow release of anthelmintics over a prolonged period are under development for sheep and seem an ideal way of minimising worm egg output .
7 The main difference , though , was that while Pompeii was obliterated by the steady accumulation of ashes over a long period , perhaps as much as two days , Herculaneum was overwhelmed in a matter of minutes , possibly well after the eruption proper had ceased .
8 This may apply to a particular period or it may be concerned with changes over a long period of time .
9 The reason may lie in what happens to the teachers themselves when they first encounter it , rather than in the use they make of it directly with children over a long period .
10 The good thing about the airlift was that pilots had clear visibility all the way into Tabubil — a rare happening in an area where rain is often measured in feet over a 24-hour period .
11 The printed edition would be issued in fascicles over a limited period of time .
12 It is understood the airline could face fines and costs totalling more than £300,000 in connection with the case which relates to events over a six-year period from 1981 .
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