" To paraphrase, I'd say: "I would like to get rid of that tick that's been biting me all day long." I wouldn't say: "I must be free from that tick." And that is why I would use "rid of" with a cold, rather than "free" (it does not matter https://boilergrantinscotland.blogspot.com/2025/07/government-boiler-scheme-wall.html