The phrase "sake of convenience" is correct and usable in written English. It is often used to describe an action that is taken in order to make something easier or more comfortable. For example: "He drove to the store instead of taking the bus for the sake of convenience.".
We've grouped the steps into four convenient parts for… well, for the sake of convenience.
For the sake of convenience, I'll call him Lewis.
It's interesting to see what compromises we will accept for the sake of convenience.
Thus, the thought of abortion for the sake of convenience does not appeal to me.
Later, for the sake of convenience, physicians began to treat their free patients at the dispensary.
Let's say, for the sake of convenience, that she's called Carla Devade.
For the sake of convenience, this change is called transition.
I love the desktop app, it’s always running on my Mac. Ludwig is the best English buddy, it answers my 100 queries per day and stays cool.
Cristina Valenza
Retail Lead Linguist @ Apple Inc.