at intervals meaning

1. Periodically
2. With prescribed spaces between

• at regular intervals:    [American slang][o ...
• birth intervals:    [Medicine]The leng ...
• confidence intervals:    [Medicine]A range ...

Examples

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1. the runners started at intervals.
2. at intervals she would stop for a rest.
3. at intervals miss simon would make a tour of inspection.
4. precipitates are usually collected by centrifugation at intervals.
5. melanie was silent too, but at intervals her quiet face was wrenched with pain.