Example sentences of "[that] over a [adj] period " in BNC.
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| 1 | One disadvantage of this to all parties is that over a long period memories fade and evidence becomes more difficult to establish . |
| 2 | However , while climatic conditions could lead to some long-term changes in the economy and to sharp annual variations in food prices , there is no reason to doubt that over a long period movements in prices and wages do indicate whether population was rising or falling . |
| 3 | When the Left want to take control of a particular constituency , they look at its controlling group and note that over a six-month period the maximum number of people attending the decision-making meetings is never more than ( say ) twenty-seven . |
| 4 | Suppose that over a six-month period , we were investigating changes in attitude of a sample of single girls to contraception , some of the group might get married . |
| 5 | But do n't forget that over a longer period , shares are bound to do better . |
| 6 | In some cases a carefully monitored rolling programme ensured that over a given period of time , say a week or a fortnight , the teacher engaged directly with every child in every area of the curriculum ; but in other cases the inequality of investment was not adjusted in this way , and the result was the persistent neglect of certain children and certain areas of the curriculum . |