IdiomDaily LifeSpanish

cada muerte de obispo

Meaning: extremely rarely; once in a blue moon.

Literally: Each death of bishop

Example: “Mi primo nos visita cada muerte de obispo.” — My cousin visits us once in a blue moon.

English equivalent: Once in a blue moon

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Origin: Bishops were appointed for life and, as the Spanish Wiktionary notes, tended to live long, so a bishop's death, with its funeral and the choice of a successor, came round very rarely. The phrase uses that as a measure of rarity, like English "once in a blue moon." Spanish has many cousins, such as de Pascuas a Ramos and cuando las ranas críen pelo (when frogs grow hair).

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