Count repeated letters in a string

Question

I\'m stuck with the following problem: I need to find repeated characters in a string. Basically what I want is regular expression that will match like that

Answer 1

This method also works well!!

let myString = 'abababc';
let result = {};
for (let str of myString) {
  result[str] = result.hasOwnProperty(str) ? result[str] + 1 : 1;
}
console.log(result);

The result will be like this {a: 3, b: 3, c: 1}