expression
morning and evening; every morning and evening; always
Set phrase meaning 'morning and evening' or 'every morning and evening'; can also imply 'constantly' or 'always' in a poetic or emphatic sense.
朝に夕にこの景色を眺めるのが日課だ。
It's my daily routine to gaze at this scenery morning and evening.
彼は朝に夕にそのことを考えていた。
He thought about it constantly, morning and evening.