" In other words, I would say: "I need to get rid of that tick that's been biting me all day." I would not say: "I must be free from that tick." And that's why I'd use "rid of" with a chilly, as an alternative to "free" (it does not https://energyefficiencygrants.blogspot.com/2025/07/boiler-upgrade-scheme-cavity-wall.html