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

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1 I visited the Tate several times over a two-year period .
2 They mainly worked on the final phase of a mapping and mineral exploration programme on the island of Santa Isabel , in which four BGS geologists have worked at various times over a six-year period .
3 Instead he became an alcoholic ( a ‘ half-alcoholic ’ he preferred to call it ) who required to dry-out in hospital about 50 times over a 25-year period .
4 Staggered working hours would spread travelling times over a longer period of the day and in many cases allow more efficient use of factories , offices , schools and the equipment therein .
5 It was at least the sixth time over a two-year period that the unveiling had been postponed .
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