This is the 2321st most frequent Turkish word.
doktora
"Doktora" means "doctorate" (the highest academic degree).
In this sentence, 'doktora' refers to 'doctor' in the dative case, indicating whom the action is directed toward.
Doktora hastalarını muayene ediyor.
The doctor is examining her patients.
Here, 'doktora' is in the dative case, signifying the destination of 'going'.
Dün gece doktora gittik.
We went to the doctor last night.
In this usage, 'doktora' pertains to 'doctorate', representing the advanced academic degree my friend aims to achieve.