python - 如何對清單中的清單進行頻率統計？

Question

例如此列表：

[['software', 'foundation'], ['of', 'the'], ['the', 'python'], ['software', 'foundation'],['of', 'the'], ['software', 'foundation']]


# 进行频率统计，例如输出结果为：
("['software','foundation']", 3), ("['of', 'the']", 2), ("['the', 'python']", 1)

Answer 1

雷雷

Answer 2

雷雷

Answer 3

雷雷