def METHOD_NAME(fseries, qrange, frange, mismatch=0.2):
    """Iterable constructor of QTile tuples
    Parameters
    ----------
    fseries: 'pycbc FrequencySeries'
        frequency-series data set
    qrange:
        upper and lower bounds of q range
    frange:
        upper and lower bounds of frequency range
    mismatch:
        percentage of desired fractional mismatch
    Returns
    -------
    qplane_tile_dict: 'dict'
        dictionary containing Q-tile tuples for a set of Q-planes
    """
    qplane_tile_dict = {}
    qs = list(_iter_qs(qrange, deltam_f(mismatch)))
    for q in qs:
        qtilefreq = _iter_frequencies(q, frange, mismatch, fseries.duration)
        qplane_tile_dict[q] = numpy.array(list(qtilefreq))
    return qplane_tile_dict