def harmonic_in_band(fvco, bands):
    """Get description of band containing fvco frequency

    :param fvco: frequency
    :type fvco: ``int`` or ``float``
    :param bands: Tuple of tuples for each band: ((lo_freq, hi_freq, description), ()...)
    :type bands: ((``float``, ``float``, ``str``), ()...)
    :return: Description of the band containing fvco, otherwise None
    :rtype: ``str``
    """

    for lower, upper, desc in bands:
        if int(lower/fvco) != int(upper/fvco):
            return desc
    return None