Example sentences of "[verb] in [noun] over a period " in BNC.

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1 Storage space had to be found for this unusually large collection of books which arrived in batches over a period of weeks .
2 Plants in some 34 families were used in Borneo over a period of 16 months and all but 5 were sources of fruit .
3 This gives judicial support to the view that financial statements have a limited useful life ( of less than 15 months ) and depreciate in usefulness over a period of time .
4 Change in landscape over a period T = t 2 - t 1 can be measured either by integration of fluxes or by net displacement of a system parameter ( ) .
5 Infection by lymphocystis first appears as ‘ Cauliflower ’ -like growths which gradually increase in size over a period of several weeks or months .
6 The fry are born with large black eyes , but these steadily reduce in size over a period of weeks until they are covered with a cartilaginous sheath .
7 Engineers of this discipline are in the greatest demand , and receive the highest salaries at an early age , Imagine also that the raw material used by these engineers has been rapidly increasing in abundance and dramatically decreasing in cost over a period of 20 years .
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