" Quite simply, I would say: "I need to remove 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'd personally use "rid of" with a chilly, as an alternative to "free" (regardless of irrespective https://ecograntscheme.politics.blog/2024/09/13/4-steps-to-apply-for-government-grant-for-solar-panels/