Octennial Second
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Octennial Millisecond
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Octennial Minute
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Octennial Hour
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Octennial Day
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Octennial Week
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Octennial Month
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Octennial Year
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Octennial Decade
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Octennial Century
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Octennial Millennium
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Octennial Microsecond
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Octennial Nanosecond
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Octennial Picosecond
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Octennial Femtosecond
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Octennial Attosecond
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Octennial Shake
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Octennial Month (synodic)
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Octennial Year (Julian)
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Octennial Year (leap)
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Octennial Year (tropical)
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Octennial Year (sidereal)
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Octennial Day (sidereal)
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Octennial Hour (sidereal)
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Octennial Minute (sidereal)
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Octennial Second (sidereal)
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Octennial Fortnight
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Octennial Septennial
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Octennial Novennial
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Octennial Quindecennial
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Octennial Quinquennial
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Octennial Planck time
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