static int countFreq ( String pat , String txt ) {
  int M = pat . length ( ) ;
  int N = txt . length ( ) ;
  int res = 0 ;
  for ( int i = 0 ;
  i <= N - M ;
  i ++ ) {
    int j ;
    for ( j = 0 ;
    j < M ;
    j ++ ) {
      if ( txt . charAt ( i + j ) != pat . charAt ( j ) ) {
        break ;
      }
    }
    if ( j == M ) {
      res ++ ;
      j = 0 ;
    }
  }
  return res ;
}

static int countFreq ( String pat , String txt ) { int M = pat . length ( ) ; int N = txt . length ( ) ; int res = 0 ; for ( int i = 0 ; i <= N - M ; i ++ ) { int j ; for ( j = 0 ; j < M ; j ++ ) { if ( txt . charAt ( i + j ) != pat . charAt ( j ) ) { break ; } } if ( j == M ) { res ++ ; j = 0 ; } } return res ; }
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