A (鐘頭) 钟头 zhong1tou2 
hour (mainly used in oral Chinese) 
Stunde A (小時) 小时 xiao3shi2
hour
Stunde A (刻) 刻 ke4
a quarter of an hour/ carve/ cut
ein Zählwort, Viertel B (坐班) 坐班 zuo4 ban1
work in the office in office hours
während der Arbeitszeiten arbeiten, Arbeitszeiten einhalten C (學時) 学时 xue2shi2
study-hour/ class hour/ teaching period/ period
Unterrichtstunde D (課時) 课时 ke4shi2
class hour/ period
Unterrichtsstunde, Lehrstunde D (鐘點) 钟点 zhong1dian3
hours/ time
Stunde
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
【◎Fix:◎鐘;◎鍾】 钟 clock / bell
點 点 dot, speck, spot / point, degree
from CC-CEDICT under a Creative Commons Attribution-Share Alike 3.0 License
A (刻) 刻 ke4 a quarter of an hour/ carve/ cut ein Zählwort, Viertel B (坐班) 坐班 zuo4 ban1
work in the office in office hours
während der Arbeitszeiten arbeiten, Arbeitszeiten einhalten C (學時) 学时 xue2shi2
study-hour/ class hour/ teaching period/ period
Unterrichtstunde D (課時) 课时 ke4shi2
class hour/ period
Unterrichtsstunde, Lehrstunde D (鐘點) 钟点 zhong1dian3
hours/ time
Stunde
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
【◎Fix:◎鐘;◎鍾】 钟 clock / bell
點 点 dot, speck, spot / point, degree
from CC-CEDICT under a Creative Commons Attribution-Share Alike 3.0 License
C (學時) 学时 xue2shi2 study-hour/ class hour/ teaching period/ period Unterrichtstunde D (課時) 课时 ke4shi2
class hour/ period
Unterrichtsstunde, Lehrstunde D (鐘點) 钟点 zhong1dian3
hours/ time
Stunde
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
【◎Fix:◎鐘;◎鍾】 钟 clock / bell
點 点 dot, speck, spot / point, degree
from CC-CEDICT under a Creative Commons Attribution-Share Alike 3.0 License
D (鐘點) 钟点 zhong1dian3 hours/ time Stunde Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
【◎Fix:◎鐘;◎鍾】 钟 clock / bell 點 点 dot, speck, spot / point, degree from CC-CEDICT under a Creative Commons Attribution-Share Alike 3.0 License