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once in a blue moon
<12>
11 years ago|2.7k views|share |citing 
APASmart Define. (2015). now and then thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/now_and_then/thesaurus/synonyms
ChicagoSmart Define. 2015. "now and then thesaurus" https://smartdefine.org/now_and_then/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2015, now and then thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/now_and_then/thesaurus/synonyms>.
MLASmart Define. "now and then thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/now_and_then/thesaurus/synonyms>