" Quite simply, I'd personally say: "I need to get rid of that tick that is been biting me all day." I wouldn't say: "I have to be free from that tick." And that's why I might use "rid of" with a chilly, in lieu of "free" (it doesn't matter https://greenenergygrants.school.blog/2024/08/21/how-to-apply-for-solar-panel-grants-scotland/