给定一个英文文本，找到其中每个单词的词频，并以递减的方式输出前10个最常出现的单词和对应的词频。
'''
Python is an interpreted, high-level, general-purpose programming language.
Created by Guido van Rossum and first released in 1991, Python's design philosophy emphasizes code readability
Python is widely used in web development, scientific computing, data analysis, artificial intelligence, and more.
'''
Python: 2
is: 2
and: 2
in: 2
an: 1
interpreted,: 1
high-level,: 1
general-purpose: 1
programming: 1
language.: 1