Example sentences of "only once [conj] [adv] a " in BNC.

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1 At the farthest end of the scale is the person who tries to improve his or her shape only once or twice a year , perhaps even less .
2 The arrival of a train would be a significant event , galvanizing a whole community into action perhaps only once or twice a day .
3 This fact can be used to advantage by those who drink alcohol occasionally perhaps only once or twice a week on social occasions , and not every day .
4 The valuation of trading stock will normally take place only once or twice a year to coincide with the date of the end of the builder 's financial year or half-year , although larger companies may prepare quarterly accounts .
5 Perhaps it was only once or twice a month .
6 ‘ My supplies come by van and that 's only once or twice a month . ’
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