wordin.js

bukvy = new Set();
word = 'world asdf a asdf asdf asdf asd fasdf sadf asdf asdf asdf as234234df asdf sadf asdf 5 alkjlkjkjsdf asdf asdf asd fasdfasd fasdf';
out = [];
word.replace(/\d|\s/g, '').split('').forEach(
function(bukva) {
  bukvy.add(bukva);
}
);

bukvy.forEach(function(bukva) {
   var re = new RegExp(bukva, 'g'), 
       howmany = word.match(re).length;
   out.push({bukva: bukva, howmany: howmany});
});

out.sort(function(a, b){
  return (a.bukva > b.bukva)? 1:-1;
});
out.forEach(function(el){
console.log(el.bukva, el.howmany);
});