Questions & Answers about Ben günde iki defa çay içiyorum.
Günde comes from gün (day) + the locative suffix -de, which literally means “in the day.” Used adverbially, günde means “per day” or “a day.”
• gün → “day”
• günde → “in a day” → “per day”
All three—defa, kez, and kere—mean “time(s)” in the sense of occasions or repetitions.
• defa is somewhat neutral and common in both spoken and written Turkish.
• kez is very similar in usage to defa.
• kere is a bit more colloquial, often used in everyday speech.
So iki defa, iki kez, and iki kere are all correct and interchangeable here: “twice.”