Example sentences of "[v-ing] [art] [noun] [prep] a period " in BNC.

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1 To test its effectiveness , Biotherm monitored 80 women using the treatment over a period of 30 days .
2 The Insurance Company Nationale Nederlanden , which owns the newly completed office block , is sponsoring the undertaking for a period of five years .
3 The results of testing the model over a period from the late 1890s to 1970 are satisfactory for all the variables employed , and the government 's impact upon union growth is shown to be highly significant .
4 He and the Bosnian Croat leader , Mate Boban , also signed a new paper giving interim arrangements for governing the country during a period up to two years .
5 They had to look only as far as France to learn how pernicious are the effects of unlocking the archives after a period when the secret police have been keeping open house .
6 But what will be the effect of extending the interval to a period of days or even weeks ?
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