why isn't there a rating graph for lunchtime?

Initially, I was shown “LTime” and “LTime (All)”- ranks and ratings on my profile. Now, it only shows LTime (All).

  1. Why this transition?
  2. What is the difference between LTime and LTime (All)?
  3. Also, why isn’t there a rating graph for lunchtime?

I’ve the same question

LTime is mainly for school students. so now if your institute(that you have entered in your profile) isn’t a school, then you will only see LTime(all).

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