def _cumulative_frequencies(self, samples):
        cf = 0.0
        for sample in samples:
            cf += self[sample]
            yield cf

    # slightly odd nomenclature freq() if FreqDist does counts and ProbDist does probs,
    # here, freq() does probs
Return the cumulative frequencies of the specified samples.
dataset/ETHPy150Open nltk/nltk/nltk/probability.py/FreqDist._cumulative_frequencies