Example sentences of "[coord] [adv] over a period " in BNC.

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1 A currency which gradually adjusts up or down over a period of time , depending on the intrinsic strength of the economy which supports it , is much less likely to attract the eye of the speculator than one which is about to burst the artificial dam which has been built around it .
2 They all had their pictures done and eventually over a period of about a year , she actually did a portrait of everybody in the Home .
3 It is much better to build up endurance levels gradually and gently over a period of weeks and months .
4 And even over a period as long as 15 years we would be paying a lot less ( £184 millions ) than the £684 millions that will go next year to safeguard the Falkland Islands from the Argentinians — a matter which many ecologists see as a fight between two bald men over the possession of a comb .
5 You will need to spray at three day intervals at least three or four times , but preferably over a period of several weeks to control any new pests as soon as they hatch , before they can reproduce .
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