A dashboard that presents issue type that were added a few days after a sprint started

[Shiri Feldman]

Hi. I want to create a dashboard that captures the issue types added a few days after a specific sprint had started using a rich filter.
To do so, I initiated a scrum board for my entire group to include all my teams' sprints and used the following formula -

project in (xxxx) AND issueFunction in addedAfterSprintStart("My group scrum board")

I faced two problems:

1. addedAfterSprintStart -
   1. Does this function calculate all the issue types added a day after a sprint initiates?
   2. What is its measure unit? 
   3. Is it possible to define the counting of the additional tickets at a daily level and not at a minute level?
2. It seems as if the drop-down list didn't include all the previous/historical sprints but the active ones only.  Is that correct? What am I missing?
   
   Thanks