As you have found, get just gets the value corresponding to a given key. As advised by andy e while answering this question, it's not good for your script's performance if it's repeatedly building. The sample code in your question is clearly trying to count the number of occurrences of each character:
Five magazine layout tips and tricks in Adobe InDesign YouTube
The get/set pattern provides a structure that allows logic to be added during the setting ('set') or retrieval ('get') of a property instance of an instantiated. If so, how should i then do it? 11 here is my solution.
If it already has a count for a given character, get.
Sorted will iterate through the iterable it's passed.
