hightest frequency charactor-what about a word

//char
var s="asdfasdfasdfasdfasdfasdfasdfasfdasdfasdfasdf";
var a=s.split('');
a.sort();
s=a.join('');
var ans=s.match(/(\w)1*/g);
ans.sort(function(a,b){return a.length >b.length})
console.log(ans[0][0]+':'+ans[0].length);

//word
//1. it's a word
//2. it's not only appear once
//3. where is it?
//4. if don't have one, just tell me
//5. what's the cost?

//can you give it to me ?