把一个英文文档的单词按照出现次数从高到低排列，并输出排好序的单词及其出现次数


The sky is blue and the sun is shining. The dog is playing in the park. The park is a beautiful place. I enjoy taking a walk in the park.
The: 3
is: 3
park: 2
in: 2
and: 1
sky: 1
blue: 1
sun: 1
shining: 1
dog: 1
a: 1
beautiful: 1
place: 1
I: 1
enjoy: 1
taking: 1
walk: 1