测试环境：
mac
python3.6.5
安装
pip install nltk
代码示例
# -*- coding: utf-8 -*-
from nltk import FreqDist
from matplotlib import rcParams
# matplotlib 设置中文字体
rcParams["font.family"] = "STHeiti"
rcParams["font.size"] = 8
words = ["你好", "你好", "我好", "我还有"]
freq = FreqDist(words)
print(freq.most_common(1)) # [('你好', 2)]
print(freq.freq("你好")) # 频率 0.5
print(freq["你好"]) # 次数 2
freq.tabulate() # 频率分布表
freq.plot() # 频率分布图
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