The bot counts how many times the set letters are found, this will be once per message. So if someone says in this case wolf bla wolf the bot only counts one (the first one). Data refreshes every 2 minutes based on cron time (so 02, 04, 06, etc...).
You can add this bot by going to this page. It will ofcourse ask you to go through some steps set by Discord to safely add it to the wanted server (Only 100 guilds possible, it may not be verified for more).