free period

US /ˈfriː ˌpɪr.i.əd/
UK /ˈfriː ˌpɪr.i.əd/
"free period" picture
1.

空閒時間, 自習課

a period during the school day when a student does not have a class and is free to do other things

:
During my free period, I usually go to the library to study.
在我的空閒時間,我通常去圖書館學習。
Do you have a free period next?
你接下來有空閒時間嗎?