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sometimes; at intervals; occasionally; on occasion; from time to time
時折り窓の外を眺めながら原稿を書き進めた。
I continued writing the manuscript, occasionally glancing out the window.
普段は穏やかな彼が時折り厳しい顔を見せる。
Normally calm, he occasionally shows a stern expression.
時折り降る雨が庭の花を潤していた。
The occasional rain was watering the garden flowers.