0
on-and-off(adverb, variable, intermittent, uncertainly, infrequently)
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on occasion(expression, uncertainly, variably, alternately, on-and-off)
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once in a blue moon
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once in a while(adverb, infrequently, intermittently, sporadically)
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periodically(adverb, infrequently, intermittently, sporadically)
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rarely
0
scarcely(adverb, variable, vacillating)
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seldom
0
sparingly
0
uncommonly
0
unusually
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up and down(expression, idiom, variably, alternately)
0
vacillating(adverb, variable, variably, alternately)
0
variable(adverb, vacillating, intermittent, infrequently, intermittently)
0
whiles
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APASmart Define. (2015). at irregular intervals thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/at_irregular_intervals/thesaurus/synonyms
ChicagoSmart Define. 2015. "at irregular intervals thesaurus" https://smartdefine.org/at_irregular_intervals/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, at irregular intervals thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/at_irregular_intervals/thesaurus/synonyms>.
MLASmart Define. "at irregular intervals thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/at_irregular_intervals/thesaurus/synonyms>