Englishfor English speakers
regularity
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noun
the quality of being characterized by a fixed principle or rate
he was famous for the regularity of his habits
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noun
a property of polygons: the property of having equal sides and equal angles
interval
Noun
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A distance in space or in time.
There is a ten-minute interval between classes.
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In music, an interval is the difference in pitch between two notes.
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In mathematics, an interval is a connected section of the real line.
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(mostly British) An intermission.
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In the game of cricket, either of the two breaks, at lunch and tea, between the three sessions of a day's play.