public int qFrq(int idx)
  {
    if(!_ok || idx<0 || idx>=h_index_size()){
      return -1;
    }
    return _index.getInt(4*8*idx+12);
  }
Class for accessing the concept network automata.

@author  <a href="mailto:boros@yahoo-inc.com">Peter Boros</a>
fsa/src/main/java/com/yahoo/fsa/conceptnet/ConceptNet.java