re: Does a freezer tripping the breaker once a day indicate the compressor is failing?

Are you sure it is an isolated circuit? Is it in your garage? If so it may be tied into all your outdoor lights. Is it recent after installing seasonal Christmas lights or have you had the issue prior to that if that is the case?

I ask because I had a similar situation. I moved mine to a separate plug from the circuit my lights were on and never had another issue.