Example sentences of "period [prep] a [det] years " in BNC.

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1 It was a difficult period for a few years until the market caught up with us . ’
2 Other changes in structure developed more slowly , but although the pattern looked different over a period of a few years , analogues of the basic groups seem to have been present ever since the phenomenon of the contemporary football fan arose in the middle to late 1960s .
3 As it happens , there is a substantial engine refurbishment contract in the offing which ( although tenders have not yet been invited ) promises to bring someone several tens of millions of pounds in revenue over a period of a few years .
4 Scientific studies carried out a few years ago revealed that regular sunbed users ( those using a bed more than once a week over a period of a few years ) now have a condition called skin fragility syndrome .
5 Seismic data were returned to Earth over a period of a few years from these five stations , though they were reduced to four when the Apollo 11 station stopped working .
6 Thus , we have : For two main reasons , economists are usually quite happy to work with ‘ gross ’ rather than ‘ net ’ figures : first , depreciation tends to change only slowly over time so that the ‘ gross ’ and ‘ net ’ figures move closely together over any period of a few years ; and secondly , depreciation figures are notoriously difficult to estimate with any accuracy .
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