Example sentences of "over a [adj] period [prep] [num] " in BNC.

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1 The arrangement provided for the repayment of all the principal owed for 1989 and 1990 and half the interest payable for 1989 over a 10-year period with five years ' grace .
2 In April responsibility for funding residential and nursing home care will be transferred from the Department of Social Security to local authority social services departments over a phased period of four years .
3 One other study , in which a group of 341 epidemiologists had H pylori antibody state assessed over a mean period of 8.5 years , also showed a low rate of serovonversion to a positive antibody state over time , ( 0.49% per person year ) .
4 Sickness absence records of 9072 participants ( 88% of the total sample ) were examined over a mean period of 20 ( range 0.3–39.6 ) months .
5 It is understood the airline could face fines and costs totalling more than £300,000 in connection with the case which relates to events over a six-year period from 1981 .
6 On 7 June 1972 the Occupational Safety and Health Administration ( OSHA ) issued a standard on asbestos exposure at work which took effect over a four-year period to 1 July 1976 .
7 Wright and West , in a study of all incidents recorded by the police as genuine rapes or attempted rapes in six English counties over a five-year period from 1972 to 1976 , found that of a total of 297 cases , fellatio was attempted or demanded in 30 incidents , cunnilingus in 13 , buggery in 12 and other sexual acts usually involving masturbation in 35 .
8 After the initial four weeks , patients treated with prednisolone were withdrawn from this drug over a further period of 6.5 ( 2.4 ) weeks .
9 The total number of pieces of gum used in the first day should be gradually reduced over a subsequent period of ten days .
10 Improvement was maintained over a follow-up period of six months .
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