我認為你有幾多時間去train佢都要考慮,
if she never works in HK, she needs more time to adapt to the new environment.
Besides, for a experienced HK maid, less training is needed. However, she will normally compare your family with her ex-employer(s). Therefore, you need to tell her your rules in detail on the first day she comes. Otherwise, she will feel unhappy when somethings seems to be different from her previous experience.