public class Test {

  public static void main(String[] args) {
    String test = "AccountAccounts ssgs AccouAccount more Account";
    int count = 0;
    int beginAt = 0;
    int where;
    while ((where = test.indexOf("Account", beginAt)) != -1) {
      count++;
      beginAt = where + 1;
    }
    System.out.println(count); // 4
  }

}