"Sometimes Péter works."

Translation: Péter néha dolgozik.

[Martybet]

Quite often (not always) these Hu sentences can be translated word for word. As here for example "Peter sometimes works" which is perfectly good English but of course it's not accepted as a answer, which is very irritating.

[1158534388]

Jó neki ! Good for her !

[orokremagyar]

How is valamikor and neha different and in "sometimes peter works" can valamikor be used correctly?