Example sentences of "[verb] over a [num] month " in BNC.
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| 1 | Their combined list size was 250739 and from this population a total of 897 attacks was reported over a three month period . |
| 2 | The results of investigations in all patients referred by family practitioners to a medical gastroenterology outpatient clinic for the investigation of iron deficiency anaemia were prospectively collected over a 17 month period . |
| 3 | Until now , the Authority has been prevented from taking action because of a Water Act requirement that samples be collected over a 12 month period . |
| 4 | The 30 second commercial is a variation on the successful launch advertising and is scheduled over a two month period in England and Wales . |
| 5 | Volunteers were enrolled over a nine month period . |
| 6 | The process of intervention will be studied over a four month period from the time of first referral . |