" To put it differently, I'd say: "I would like to eliminate that tick which is been biting me all day." I wouldn't say: "I have to be free from that tick." And that's why I'd use "rid of" with a chilly, rather then "free" (regardless of whether or not https://share.evernote.com/note/447d9542-c602-9341-9bfa-9cafbe9cb233