with open(os.path.join('examples', 'modomics.trna.canonical-code-freq.tsv'), 'w') as file:
        writer = csv.DictWriter(file, fieldnames=['Code', 'Frequency'], dialect='excel-tab')
        writer.writeheader()
        for code, freq in canonical_code_freq.items():
            writer.writerow({'Code': code, 'Frequency': freq})