function search_word(text, word){  
      
    var x = 0, y=0;  
     
    for (i=0;i< text.length;i++)  
        {  
        if(text[i] == word[0])  
            {  
            for(j=i;j< i+word.length;j++)  
               {  
                if(text[j]==word[j-i])  
                  {  
                    y++;  
                  }  
                if (y==word.length){  
                    x++;  
                }  
            }  
            y=0;  
        }  
    }  
   return "'"+word+"' was found "+x+" times.";  
}  
  
console.log(search_word('The quick brown fox', 'fox'));  
console.log(search_word('aa, bb, cc, dd, aa', 'aa'));