free period
US /ˈfriː ˌpɪr.i.əd/
UK /ˈfriː ˌpɪr.i.əd/

名詞
1.
空き時間, 自習時間
a period during the school day when a student does not have a class and is free to do other things
例:
•
During my free period, I usually go to the library to study.
空き時間には、たいてい図書館に行って勉強します。
•
Do you have a free period next?
次は空き時間ですか?
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