千載難逢ChinesePronunciationQian Zai Nan FengLiteral Translation not occurring once in a thousand yearsEquivalentsThis is how you express this idiom across languages and locales.ListMapEnglishOnce in a blue moonFrenchtous les trente-six du moisevery thirty-six of the monthItalianOgni morte di PapaOnce every Pope’s deathPolishraz na ruski rokonce in a Russian yearSpanishcada muerte de obispoeach death of a bishopLogin to correlate with other idioms