This is the 3409th most frequent Turkish word.
konuşmanın
"Of the conversation" or "of speaking."
'Konuşmanın' is used as the possessive form of 'konuşma' referring to 'the speech' with a genitive structure.
Konuşmanın başında kendimi tanıttım.
At the beginning of the speech, I introduced myself.
Here, 'konuşmanın' specifies the speech referred to as an entity in the conversation topic.
Bu olay, konuşmanın tamamında anlatıldı.
This event was explained throughout the entire speech.
In this usage, 'konuşmanın' refers to time relative to the speaking event with post-position usage.