def in_sequence( word, ref_set, ref_reason, freq_threshold = 2 ):
        """ ignore ctx information right now. If repetition/match length >= @freq_threshold then we flag-it """
        chars = get_letters(word)
        flag = True #no error assumed
        reason = None #no reason
        freq_count = 0
        for char in chars:
            if char in ref_set:
                freq_count += 1
                if freq_count >= freq_threshold:
                    flag = False
                    break
                continue
            freq_count = 0 # continue loop
        if not flag:
            reason = ref_reason
        return flag,reason