" Quite simply, I'd personally say: "I need to get rid of that tick which is been biting me all day." I would not say: "I must be free from that tick." And that is why I would use "rid of" with a cold, in lieu of "free" (regardless of https://greenenergygrants.school.blog/2025/07/20/government-grant-insulation-scheme-save-energy-cut-costs-now/