How long do I use minoxidil in eyebrows to get a definitive result?

[Skyness]

I have been using minox on my eyebrows for about 9 months, before I had almost no eyebrows but now I have a little more, it's just not enough, is it okay to use it for 1 or 2 more years to get a definitive result?

 

[Brootal]

dye them and see the magic unfold

I guarantee you have tens of white translucent hair in there