You may want to check ecm.txt, found in the kit file.
However, I believe that only has the data for the effect of flashes, grenades, c4, breaches, etc, not the throwing or placing time.
However... I think I hit the target.
Look in the kit file, open (for example) largebreach.eq and frag.eq. A breaching charge takes a while to place, and a frag takes a short amount of time to place (fill up the bar.)
Notice where it says "# // Encumbrance"
the breach is 30, a large number
the frag is 5, a small number
You can notice similarities, like... electronic kit is a large number, and flashbangs are a small number.
That is my guess, but I bet 20 bucks it's
wrongGotta love the edit feature