once in a while

Другие идиомы:

• once or twice
• once upon a time
• once-over
• once in a lifetime
• once in a blue moon
• once and for all
• all-in-one
• all in one piece
• all rolled up in one
• as busy as a one-armed paperhanger
• as one
• at first
• at one time
• at sixes and sevens
• at the eleventh hour