Example sentences of "[vb base] up from time to time " in BNC.

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1 Such errors show up from time to time as inconsistencies in the records , but much worse are those that go undetected , and which could lead to the wrong conclusions being drawn when the records are analysed .
2 Your two crystals grow visibly : they break up from time to time and the pieces also grow .
3 I just pop up from time to time to see if Bob 's all right . ’
4 Finally , he makes considerable use of ‘ natural experiments ’ , the sociological , or in this case literary , device , of studying those natural contrasts which crop up from time to time .
5 It is never a good idea to sit for long periods but , if this is essential , get up from time to time in order to move the body .
6 There are many other more common causes of aortic incompetence , including rheumatic fever , but cases of syphilitic aortic-valve disease still turn up from time to time in this country , albeit rarely .
7 They turn up from time to time . ’
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