Periodicity (Regularity of recurrence)
Nouns
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periodicity, intermittence
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beat
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oscillation etc. [Reciprocating motion, motion to and fro.] Oscillation
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pulse, pulsation
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rhythm
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alternation, alternateness, alternativeness, alternity. bout, round, revolution, rotation, turn, say. anniversary, jubilee, centenary. catamenia, courses, menses, menstrual flux. [Regularity of return] rota, cycle, period, stated time, routine
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days of the week
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Sunday, Monday etc.
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months of the year
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January etc.
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feast, fast etc.
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Christmas, Easter, New Year's day etc.
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Allhallows, Allhallowmas, All Saints' Day
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All Souls', All Souls' Day
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Ash Wednesday, bicentennial, birthday, bissextile, Candlemas, Dewali, groundhog day [U.S.], Halloween, Hallowmas, Lady day, leap year, Midsummer day, Muharram, woodchuck day [U.S.], St. Swithin's day, natal day
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yearbook
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yuletide. punctuality, regularity, steadiness.
Verbs
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recur in regular order, recur in regular succession
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return, revolve
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come again, come in its turn
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come round, come round again
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beat, pulsate
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alternate
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intermit.
Adjectives
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periodic, periodical
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serial, recurrent, cyclical, rhythmical
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recurring etc. v.
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intermittent, remittent
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alternate, every other. hourly
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diurnal, daily
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quotidian, tertian, weekly
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hebdomadal, hebdomadary
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biweekly, fortnightly
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bimonthly
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catamenial
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monthly, menstrual
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yearly, annual
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biennial, triennial, c.
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centennial, secular
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paschal, lenten, c. regular, steady, punctual, regular as clockwork.
Adverbs
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periodically etc. adj.
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at regular intervals, at stated times
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at fixed established, at established periods
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from day to day, day by day. by turns
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in turn, in rotation
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alternately, every other day, off and on, ride and tie, round and round.