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

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1 As weak springs can only stored a fraction of the potential energy that a strong spring can hold , the remainder is lost as heat and if the change from a strong to a weak spring takes place over a period of time , equivalent to the observation time , then the energy loss is detected as mechanical damping .
2 Spread is slow and extension may take place over a period of months , even years .
3 The rebuilding of the old manor took place over a period of about five years and was probably finished in about 1727 .
4 But the change was n't radical , it took place over a period of er I would suggest er maybe about six or seven years .
5 Some settlement is likely to take place over a period after the trench has been filled , but this can be filled in at a later stage .
6 Altogether , tutorials take place over a period of about twenty-four weeks in the last year of a course , and usually by the last twelve tutorials a student has a much clearer idea of what he or she is about .
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