Second, talk to your parents when it is convenient for them.

其次，在父母方便的时候和他们谈谈。

youdao

Please call on me when it is convenient for you.

请在方便的时候来找我。

youdao

Surgery is almost always by your choice (elective) and can be scheduled when it is convenient.

要不要做手术几乎都是由你自己决定的（选择性），而且这类手术属于择期手术。

youdao

So it's convenient if you wanna check and see when the next bus is coming.

用手机可以查下一趟车什么时候来，非常方便。

没有智能手机活不了 - SpeakingMax英语口语达人

We must follow it not only when it is convenient, but when fear and danger beckon in a different direction.

FORBES: Justice, Dispensed with an Even Hand

Some might see this crisis-of-faith as very convenient when the show is reaching a point where it can do with or without the character (Jones appears very little this season).

FORBES: Why God Should Let Angus T. Jones Leave 'Two And A Half Men'

Being wrist-mounted, a watch is always close at hand, which makes it particularly convenient when operating contactless readers on public-transport systems (such as those used by London's Oyster system).

ECONOMIST: MONITOR