Backhand topspin

My forehand topspin is very good but my backhand topspin is not developing.  For 2 and a half years i am practicing .  I go to my club  for 3 days in a week.  The other four days its holiday in the club.  This long gap is not making my BH topspin consistent.  As for example on 12 th of this month I played against my coach and defeated him 11-7.  This is because my BH topspin was connecting very well.   At least 6 out of 8 shots connected properly.  Now when I came from the club after a two day gap 4 out of around 20 shots fell.  Sir I want to know when I don't have a board how to practice this shot.  This has become my favorite shot but I cant develop it.  It's becoming very frustrating.

Hi Aishik,

Persevere with it.

You can do some shadow swings in front of a mirror in the days you have off.  This will help you.

The more you practice it the better it will become.  Sometimes these things take longer.  Just make sure you are doing the stroke correctly and it will get there.