Example sentences of "[num] or [adv] per [noun sg] " in BNC.

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1 Disregarding the influx of early 1956 , which involved about 150 birds and appears quite exceptional , the average number seen per year rose from just over one to 14 between 1952 and 1962 , jumped to 70 or more per year between 1963 and 1972 , and rose to over 100 per year between 1973 and 1976 .
2 The organisation wants to increase its investments at the rate of a dozen or so per year .
3 From the dozen or so per week when the band is in the studio , there will be up to 100 per week as they go on the road .
4 All those working less than full-time hours ( generally 35 or more per week ) may find themselves barred from pension , profit-sharing and preferential company loan schemes .
5 ‘ Fast moving ’ glaciers slid forwards in the valleys at 50 m or so per year .
6 In on large study , the perinatal mortality risk increased by 20 per cent for the infants of smokers of less than 20 per day and by 35 per cent for smokers of 20 or more per day , compared with that of non-smokers. ( 5 ) The risk is greater in women who are poor , anaemic or have had several children .
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