192. Word Frequency My Submissions Question Leetcode Bash

Write a bash script to calculate the frequency of each word in a text file 

words.txt

.

For simplicity sake, you may assume:

• words.txt

   contains only lowercase characters and space 

  ' '

   characters.
• Each word must consist of lowercase characters only.
• Words are separated by one or more whitespace characters.

For example, assume that 

words.txt

 has the following content:

the day is sunny the the
the sunny is is
      

Your script should output the following, sorted by descending frequency:

the 4
is 3
sunny 2
day 1
      

Note:

Don't worry about handling ties, it is guaranteed that each word's frequency count is unique.

# Read from the file words.txt and output the word frequency list to stdout.
grep -oE '[a-z]+' words.txt | sort | uniq -c | sort -r | awk '{print $2" "$1}'