Grammar help pls?

Hi there,

Could you check for me if I have made any mistakes in these "active and passive" patterns, pls?

This brand is my most frequently buy in last many years. (Active voice, I think)

This brand is the most popularly sold in the market on the Japan. (Passive voice, I presume)

This is a color the most frequently sold in Japan here. (Passive)

This kind of the question I ask most often. (Active)

Thanks in advance.