If you're damaging the muscle while stretching… Okay, I'm gonna assume you're not letting any of you're stretches produce pain. You should feel tension, only, which should not be harmful.

In my experience and training, stretching every day is practical and effective. Skipping a day can cause noticeable tightening. Tension for the purpose of becoming more limber should be held for a minimum of 10 sec, but 30 sec. is a much better basic level. There should not be tremor or pain; either of those will be counter-productive and potentially result in injury.

What are you basing that on? Elite mobility coaches like Kelly Starter recommend daily - even hourly -mobility and stretching workouts, with the goal of being constantly mobile.