" Put simply, I'd personally say: "I need to remove that tick which is been biting me all day long." I would not say: "I must be free from that tick." And that's why I'd personally use "rid of" with a cold, rather then "free" (irrespective of whether of Edit: https://greenenergygrantswales.blogspot.com/2025/07/boiler-upgrade-scheme-cavity-wall.html