如何从Python列表中返回频率的嵌套列表？

from collections import Counter

def get_frequency_list(input_list):
    freq_counter = Counter(input_list)
    sorted_freq = sorted(freq_counter.items(), key=lambda x: x[1], reverse=True)
    frequency_list = [[item[0], item[1]] for item in sorted_freq]
    return frequency_list

my_list = ['a', 'b', 'a', 'c', 'c', 'a', 'b', 'd']
result = get_frequency_list(my_list)
print(result)

[['a', 3], ['b', 2], ['c', 2], ['d', 1]]