This is the 17th most frequent Armenian word.
ընթացքում
"During" or "in the process of."
"Ընթացքում" here highlights the time frame (negotiations) during which an event (agreement) occurred.
Բանակցությունների ընթացքում հաջողվեց համաձայնության գալ։
During the negotiations, an agreement was reached.
Here, "ընթացքում" is used to indicate the period of time in which the action occurs; specifically, 'during dinner'.
Մենք կզրուցենք ընթրիքի ընթացքում։
We will talk during dinner.
In this sentence, "ընթացքում" is applied to describe something happening over the duration of the travel.