在给定的英文文本语料库中找到出现最频繁的5个单词和每个单词的出现次数。


文本语料库示例：
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity.
The, it, was, of, and (每个单词出现的次数从高到低排列） 

The: 6
It: 6
Was: 6
Of: 6
And: 1