<prompt> Poleloana e reng hang ka khoeli e putsoa e tsoa hokae?nan  <response>: Instruction in English: Where does the phrase once in a blue moon come from? . Response in English: The phrase once in a blue moon is used to describe a rare event, something that happens very infrequently. The term blue moon is given when there are two full moons in one calendar month or the third of four full moons in a season. As this occurs approximately once every 2.7 years, it is considered a rare event, and the phrase once in a blue moon came to be used to describe any infrequent or rare occurrence. However, the earliest known uses of the term blue moon was actually used to mean never, as it was considered impossible to have two full moons in one month. The phrase then slowly evolved over time to mean something rare but still possible. . Response in Sesotho: Poleloana hang ka khoeli e putsoa e sebelisoa ho hlalosa ketsahalo e sa tloaelehang, ntho e etsahalang ka seoelo. Lentsoe khoeli e putsoa le fanoa ha ho na le likhoeli tse peli tse tletseng khoeling e le ngoe ea almanaka kapa khoeli ea boraro ho tse nè tse tletseng ka nako. Kaha sena se etsahala hoo e ka bang hanngoe ka mora lilemo tse ling le tse ling tse 2,7, se nkoa e le ketsahalo e sa tloaelehang, me poleloana e reng hang ka khoeli e putsoa e ile ea sebelisoa ho hlalosa ketsahalo leha e le efe e sa tloaelehang kapa e sa tloaelehang. Leha ho le joalo, tšebeliso ea khale ka ho fetisisa ea lentsoe khoeli e putsoa e ne e hlile e sebelisetsoa ho bolela le ka mohla, kaha ho ne ho nkoa e le ntho e ke keng ea khoneha ho ba le likhoeli tse peli tse tletseng khoeling e le ngoe. Joale poleloana eo e ile ea fetoha butle-butle ha nako e ntse e ea ho bolela ntho e sa tloaelehang empa e ntse e ka khoneha. 