How to use "frail" in a sentence

There was a frail old man inside

Danny became excited when he saw her drawing near, and in spite of his terrible condition, he shakily thrust himself into a sitting position, clutching at the bed rails with one frail, trembling hand, eagerly extending his other hand toward her.

With smiles, murmured assurances, and kisses planted on his frail hands, she finally managed to persuade him to tuck both of his arms close to his body.