This is the 7658th most frequent Turkish word.
hükümetinde
"In his/her/its government."
In this sentence, 'hükümetinde' is used as a locative case indicating 'in his government' related to Mustafa Kemal Atatürk.
Mustafa Kemal Atatürk hükümetinde birçok reform gerçekleştirdi.
Mustafa Kemal Atatürk implemented many reforms during his government.
Here, 'hükümetinde' is used to refer to the condition within 'the government of the country'.
Bu kriz, ülkenin hükümetinde ciddi değişimlere neden oldu.
This crisis caused significant changes in the country's government.
In this sentence, 'hükümetinde' specifies actions taking place 'within the minister's government', indicating possession and locative case.