Saves the characters that are repeated within the array in a unique index in a dictionary. If the character was repeated more than the times indicated by the second parameter of the function, it is deleted from the result.

hastTable.js

function deleteNth(arr,n){
  const result = []
  const dict = {}
  for (const num of arr) {
    if (num in dict) {
      if (dict[num] < n) {
        result.push(num)
      }
      dict[num]++
    } else {
      dict[num] = 1
      result.push(num)
    }
  }
  return result
}

deleteNth(
  // Array with repeated numbers,
  // Maximum number of times the number can be repeated
)

//  Example:
//    deleteNth( [1,1,1,2,3,4,5,1,1,3,1,4,1], 2)
//    Output: [ 1, 1, 2, 3, 4, 5, 3, 4 ]