Word Frequency in File

Problem Description

Write a function that accepts a filename on disk, loads it into a string, then returns the frequency of a word in that string, taking letter case into account. How you define “word” is worth considering carefully.

Input

• A string representing the path to the file.
• A string representing the word to search for.

Output

• An integer representing the frequency of the word in the file.

Constraints

• The function should take letter case into account when counting the word frequency.
• The definition of "word" should be carefully considered, possibly accounting for punctuation and boundaries.

Example

Input:
filename: "path/to/file.txt"
word: "Hello"

Output:
1

Explanation:
The word "Hello" appears once in the file.

Input:
filename: "path/to/file.txt"
word: "Hello,"

Output:
0

Explanation:
The word "Hello," (with a comma) does not appear in the file.

Input:
filename: "path/to/file.txt"
word: "Spain"

Output:
1

Explanation:
The word "Spain" appears once in the file.

Input:
filename: "path/to/file.txt"
word: "in"

Output:
1

Explanation:
The word "in" appears once in the file.

Input:
filename: "path/to/file.txt"
word: "I’m"

Output:
1

Explanation:
The word "I’m" (with an apostrophe) appears once in the file.