#26 - How to Find Total Backlogs Count - Failed Subjects or Attempts

I am a big fan of Happy School, I would like to thank you for providing very valuable information. i have a doubt in counting the number of backlogs (I referred to lots of sites but finally got confused). No of backlogs = No of attempts or No of Failed subjects. Please send me a reply or post it. After referring a lot of sites I feel that maybe others could have the same doubt.