Substring Count

/* Write a JavaScript function countSubstringOccur(arr) that accepts as parameter an array of 2 elements
 arr [keyword, text]. The function finds how many times a substring is contained in a given text
 (perform case insensitive search). Write JS program substringSearch.js that invokes your function
 with the sample input data below and prints the output at the console. */

"use strict";

function countSubstringOccur(arr) {
    var text = arr[1].toLowerCase();
    var pattern = new RegExp(arr[0], 'g');
    var counterOccurs = (text.match(pattern) || []).length;

    return counterOccurs;
}

console.log(countSubstringOccur(['in', "We are living in a yellow submarine. We don't have anything else." +
"Inside the submarine is very tight. So we are drinking all the day. We will move out of it in 5 days."]));

console.log(countSubstringOccur(['your', 'No one heard a single word you said.' +
'They should have seen it in your eyes. What was going around your head.']));

console.log(countSubstringOccur(['but', "But you were living in another world tryin'" +
"to get your message through."]));

console.log(countSubstringOccur(['hi', "Hidden networks say 'Hi' only to Hitachi devices. Hi, said Matuhi. HI!"]));

console.log(countSubstringOccur(['SoftUni', "The Software University (SoftUni) trains software engineers, gives them" +
"a profession and a job. Visit us at http://softuni.bg. Enjoy the SoftUnification at SoftUni.BG." +
"Contact us.Email: INFO@SOFTUNI.BG. Facebook: https://www.facebook.com/SoftwareUniversity." +
"YouTube: http://www.youtube.com/SoftwareUniversity. Google+: https://plus.google.com/+SoftuniBg/." +
"Twitter: https://twitter.com/softunibg. GitHub: https://github.com/softuni"]));