How to count repeated strings in a line?

wrote a function in JScript as follows

function abcd(){
var stringA = "Hello how are you Hello, Hlleo, Hello, Hello. Hello";
var HelloCount =0;
var startingAt =0;

  do {
      startingAt = aqString.Find(stringA, 'Hello', startingAt, false)+1;
      HelloCount = HelloCount+1;  }
  while (startingAt<=aqString.FindLast(stringA, 'Hello', false));

Log.Message(HelloCount);
}

Here's another solution using a regular expression:

var str = "Hello how are you Hello, Hello, Hello. Hello";
var regexp = /Hello/g;
var count = 0;

var matches = str.match(regexp);
if (matches != null)
  count = matches.length;

Log.Message(count);  // 5