Create a calculated field with manually adding a list of string values

Hi @Srikanth_Baheti , I think I found another link to solve my problem. This solution recommends to overlay the views, which works for me. I calculated two different time buckets and overlay the two views.
However, I will still need to add a single column to show as line number in dashboards, like below.
Do you know if there’s any other way to solve this? Thank you!