181871

function solution(myString, pat) {
  const reg = new RegExp(`(?=${pat})`, "g");
  return myString.match(reg)?.length || 0;
}

function solution(myString, pat) {
  for (let i = 0; i <= myString.length - pat.length; i++) {
    if (myString.slice(i, i + pat.length) === pat) {
      count++;
    }
  }
 
  return count;
}