How to say "once, at some time" in Russian?

[Kogda-to]

"once, at some time" is Когда-то in Russian.

Когда-то means "once, at some time" in English.

Word #336 of 6,000 by frequency in Russian.

Когда-то мы были лучшими друзьями в школе.

We were once best friends at school.

• Общий, Common
• Тело, Body
• Вечер, evening
• Верить, To believe
• Важный, Important
• Попасть, to hit; to get (somewhere)
• Вспомнить, To recall