" Put simply, I would say: "I would like to get rid of that tick which is been biting me all day." I wouldn't say: "I must be free from that tick." And that's why I might use "rid of" with a cold, rather then "free" (it doesn't matter whether https://greenenergygrantswales.blogspot.com/2025/07/boiler-upgrade-scheme-cavity-wall.html