" Put Simply, I'd say: "I would like to get rid of that tick that is been biting me all day long." I wouldn't say: "I must be free from that tick." And that is why I'd use "rid of" with a chilly, in lieu of "free" (it doesn't matter https://energyscotlandgrants.blogspot.com/2024/08/what-are-steps-to-apply-for-free.html