Write a function that takes a string and a letter as its arguments and returns the count of the letter in the string.
hello, how are you?
Explanation: The letter o appears 3 times in the given text.
Looking at the example, <text> was "hello, how are you?", and <letter> was "o".
I think you are supposed to count frequency of <letter> inside <text>, and not the other way around. So you need this instead
keg = text.count( letter )