The magic of tr command in counting the frequency of English words

We are all familiar with the tr command, which can delete replacements and delete strings. In English, we often need to count the frequency of words that appear in English. If we use the conventional method and set up a calculator to count them one by one, it is quite time-consuming. At this time, use the tr command to replace the space split with a newline character, and then use the tr command to delete the period, comma, and exclamation mark after some words. First look at the this.txt file to be replaced

The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren't special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one--obvious way to do it.
Although that way may not be obvious at first unless you're Dutch.
Now is better than never.
Although never is often better than *right* now.
If the implementation is hard to explain, it's a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea -- let's do more of those!

For the above text file, if you want to count the top 10 words that appear the most times in the text, you can use the following command

[root@linux ~]# cat this.txt | tr ' ' '\n' | tr -d '[.,!]' | sort | uniq -c | sort -nr | head -10
10 is
8 better
8 than
5 to
5 the
3 of
3 Although
3 never
3 be
3 one

It’s very convenient!

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