Example sentences of "[adv] [prep] a [adv] long period " in BNC.

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1 However , if gains are kept offshore for a sufficiently long period of time , the return on investment may exceed the increased capital gains tax liability .
2 Take the custom of mourning , for instance ; at the funeral itself , and traditionally for a much longer period , a woman who has lost a husband or close relative wears black , and can be thus almost anonymous in appearance .
3 In so doing the newcomers have contributed to the sense of urban encroachment on rural political affairs among farmers and landowners which goes back over a much longer period , and which has been associated with changes in the institutions of political control in the countryside : the gradual decline in the personalized and autocratic power of the locally resident squirearchy and the transfer of public administration to a more formal and impersonal framework of local government since local politics were first placed on a democratic footing in 1888 .
4 Investigations into the activities of this particular gang had been carried out over a very long period and they had been kept under constant surveillance by our officers who were thus able to feed us all the necessary information towards a successful interception .
5 This of course was not the main part of the work , but a pilot study used to test and refine some hypotheses about the wider sociolinguistic situation , which was then investigated more fully over a much longer period of time .
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