First you will need to pull all the metadata from your slack workspaces "customize emoji"-page in your browser.
First run script/emoji-data-analyser according to its instructions in the top of the file. Please look through the code before you blindly copy-paste it into the console in the web browser. :)
Move the data.json file from your Downloads-folder into the anylyse folder in this project, make sure the file is named data.json.
Run node analyse/analyse.js.