JSFiddle - React, Tailwind, and code Playground

JavaScript

function wordFreq(string) {
	return string.replace(/[.]/g, '')
  	.split(/\s/)
    .reduce((map, word) =>
    	Object.assign(map, {
      	[word]: (map[word])
        	? map[word] + 1
          : 1,
      }),
    	{}
    );
}

var freq = wordFreq("I am the big the big bull.");
Object.keys(freq).sort().forEach(function(word) {
    console.log("count of " + word + " is " + freq[word]);
});