I like giving broad times - like, "any time morning Singapore time 5AM to 9AM, or suggest something that works for you if that doesn't."
I don't mind "whenever works for you", as long as the person is really likely to take any time. If you get 1-3 times back after "whenever" and none work, then the burden is really on you to nail down exactly when you're free. But a general best times works better anyways and narrows things down a lot.
I don't mind "whenever works for you", as long as the person is really likely to take any time. If you get 1-3 times back after "whenever" and none work, then the burden is really on you to nail down exactly when you're free. But a general best times works better anyways and narrows things down a lot.