First, take a couple (3-4) of paragraphs from here and store it inside a .txt file.

• Open the file and read its contents into string;
• Build a dict with each word from this text (lower cased as key), counting their frequency (as its value);
• Use it to print out the most frequent 5 words in this text (together with their value!), e.g.:

[('the', 29), ('of', 18), ('and', 15), ('to', 10), ('a', 9)]