public static int countWords(String str, String findStr){

    int lastIndex = 0;

    int count =0;

    while(lastIndex != -1){

           lastIndex = str.indexOf(findStr,lastIndex);

           if( lastIndex != -1){

                 count ++;

           }

           if (lastIndex==-1) break;

           lastIndex+=findStr.length();

    }

    return count ;

}