4 occurrences across the corpus

KJV Apocrypha (Catholic Deuterocanon)

Additions to Esther 13:2

After that I became lord over many nations and had dominion over the whole world, not lifted up with presumption of my authority, but carrying myself always with equity and mildness, I purposed to settle my subjects continually in a quiet life, and making my kingdom peaceable, and open for passage to the utmost coasts, to renew peace, which is desired of all men.

Additions to Esther 15:8

Then God changed the spirit of the king into mildness, who in a fear leaped from his throne, and took her in his arms, till she came to herself again, and comforted her with loving words and said unto her,

Apostolic Fathers

Ignatius to the Trallians 1:10

Whose very look is instructive; and whose mildness powerful: whom I am persuaded, the very Atheists themselves cannot but reverence.

NT Apocrypha/Pseudepigrapha

Acts of Paul and Thecla 11:8

And while they were saying this, they laid hold on her by main force, and would have ravished her. Then she with the (greatest) mildness said to them: Young men have patience, and see the glory of the Lord.