This is the 1514th most frequent Turkish word.
gelince
"Gelince" means "when [someone] comes" or "upon arrival."
used as 'when one arrives or comes'
Eve gelince yemek hazırdı.
When I came home, the food was ready.
used as 'regarding this subject or matter'
Bu konuya gelince, detaylı bir tartışma yapabiliriz.
Regarding this topic, we can have a detailed discussion.
used as 'when a specific time arrives'