console.log(count("the quick brown fox jumps over the lazy dog", 'the')); //output 2 

function count(str, find)
{
    var temp = str.split(' ');
    console.log(temp);
    count = 0
    for(var i = 0; i<temp.length ; i++)
    {
        if(temp[i] == find)
        {
            count++
        }
    }
    return count;
}