訓 ほど,-ほど ・ 音 テイ
漢越音: trình
Rice plant 禾 gives the meaning and 呈 the sound: measuring grain by a set standard, so it means degree or extent (Han Viet trinh, as in trinh do = level).
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旅行の日程を決めましょう。 (りょこうのにっていをきめましょう)
Let us decide the travel schedule.