If the market is in a bear cycle, try dollar cost averaging (especially for larger portfolios), but keep the time frame relatively short, no more than three months, preferably in two week intervals between buys.

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Dr Orchard's analysis involved more than 600 diabetics, who were examined at two-year intervals over six years.

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So far there have been seven issues at two-month intervals.

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Testing a single component can take up to two hours because jurors do their sniffing in 15-minute intervals to avoid tainting the test.

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Having spent thirty years recording my time in 15 minute intervals, the concept of a project extending over two decades is mind boggling.

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