Example sentences of "build up over a [noun sg] [prep] " in BNC.

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1 Another proof is taken and so the print is built up over a period of time .
2 Strong and sometimes quite intense relationships with individuals are built up over a period of even a few weeks .
3 Clearly memories are not formed instantaneously , as if by throwing a switch , but are built up over a period of hours after the event to be memorized has occurred ; during this build-up the form in which any memory is stored changes .
4 In fact there was a , I think some of the recent erm concerns about schools have come from an image that 's been built up over a period of time that the schools spend very little time on the , on the three Rs for example .
5 It contains the practical experience of the members of MAS built up over a number of years of carrying out a wide variety of MAS assignments .
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