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

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1 Of course , one of the main difficulties in this kind of research lies in the collection of accurate information about events and experiences over a period of twenty years or more .
2 A programme of lectures , seminars and visits over a period of time is most likely to meet that need .
3 Will the attack on democracy be as outrageous as killing all blue-eyed babies , or will it be a more insidious erosion of rights and liberties over a period of time ?
4 Some have a substantial occupational pension , and possible capital accumulation which might allow for the provision of goods and services in a period of dependency .
5 ICI , on the other hand , runs a career break scheme where breaks are available for both men and women for a period of between two and five years .
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