module.exports = function Count(s, sep) {
  //  discuss at: https://locutus.io/php/printf/
  // original by: Kevin van Zonneveld (https://kvz.io)
  //    input by: GopherJS (https://www.gopherjs.org/)
  //   example 1: Count("cheese", "e")
  //   returns 1: 3
  //   example 2: Count("five", "") // before & after each rune
  //   returns 2: 5

  let pos
  let n = 0

  if (sep.length === 0) {
    return s.split(sep).length + 1
  } else if (sep.length > s.length) {
    return 0
  } else if (sep.length === s.length) {
    if (sep === s) {
      return 1
    }
    return 0
  }
  while (true) {
    pos = (s + '').indexOf(sep)
    if (pos === -1) {
      break
    }
    n = (n + 1) >> 0
    s = s.substring((pos + sep.length) >> 0)
  }
  return n
}