Which is which

So my question here, is the "easy" "medium" "Hard" Expert" "Nightmare" Referring to raid difficulty or base difficulties? So for example, if i wanted 10 easy Raidable bases to proc and easy raid, and 5 Medium raids to procc a medium raid , and 40 hard raids to procc a hard npc raid, how would i go about this? is the "0" "1" "2" "3"referring to the npc raid difficulties ?

  "Raidable Base plugin settings": {
    "Raid player on Raidable Base Completed": true,
    "Warn player in chat of upcoming revenge on them": true,
    "Raidable Base Settings": {
      "0": {
        "Total amount of mode complete before ever has chance": 3,
        "Raidable Base Completed Delay Before Raid chance happens": 420,
        "raid chance (1-100)": 40,
        "Random raid to send them if chance": [
          "easy"
        ]
      },
      "1": {
        "Total amount of mode complete before ever has chance": 30000,
        "Raidable Base Completed Delay Before Raid chance happens": 420,
        "raid chance (1-100)": 10,
        "Random raid to send them if chance": [
          "easy",
          "medium"
        ]
      },
      "2": {
        "Total amount of mode complete before ever has chance": 30000,
        "Raidable Base Completed Delay Before Raid chance happens": 320,
        "raid chance (1-100)": 10,
        "Random raid to send them if chance": [
          "easy",
          "medium"
        ]
      },
      "3": {
        "Total amount of mode complete before ever has chance": 3000,
        "Raidable Base Completed Delay Before Raid chance happens": 320,
        "raid chance (1-100)": 10,
        "Random raid to send them if chance": [
          "easy",
          "medium",
          "hard"
        ]
      },
      "4": {
        "Total amount of mode complete before ever has chance": 3000,
        "Raidable Base Completed Delay Before Raid chance happens": 320,
        "raid chance (1-100)": 10,
        "Random raid to send them if chance": [
          "hard",
          "expert",
          "nightmare"
        ]

Yes 0 being easy raidable base

Okay - if it hits 3 raids to trigger an NPC raid, and the raid doesn't procc, does it restart the counter?

No only when raid happens  then resets 

Edited.

So if it's not set to %100 chance and it doesnt procc it will never happen?

If not set to 100 when it hits number required if it does not happen it does not reset it will only resets if chance happenes so each time the finish a rb and there at that number for chance chance will try every time they do on intell happenes then resets