The phrase 'convenient for her' is correct and usable in written English.
You can use it when describing something that is advantageous or beneficial for someone. For example, you could say: "The new bus route was much more convenient for her since it passed by her house."
What date was convenient for her to read David Letterman's Top Ten list?
She will see him only when it is convenient for her (as he once did).
"It all became incredibly convenient for her to stick on these railway lines that she travelled on mentally.
As Lord Falconer, her lord chancellor put it: "It not being convenient for Her Majesty to be here today". I liked "not convenient".
Instead, it would be hosted in the bride's hometown, making the big day more convenient for her family members and more affordable for the couple.
It's more convenient for her motivational speaking, which takes up much of her time now, and is just down the river from Westminster.
The rules and the roles of what is presented as a genteel business keep her on her toes, and for a storyteller, the unlikely premise is also convenient for charting her growing confidence and signaling forbidden freedom.
During the latest session, one bedridden caller thanked the congressman profusely for creating such a convenient way for her to interact with him.
Her desk, shoved into a corner near the copy machine and the restrooms, is a convenient place for her co-workers to leave their half-empty coffee cups.
Anyway, Ali says Maura's new life "means we all have to start over", which seems like a convenient excuse for her to try another elusive interest.
But one gets the sense Goldstein has chosen classical music only as a convenient vehicle for her insights into human emotion.
