Constantly
3 verses in 3 books of the King James Bible.
By Book
Every Occurrence
Proverbs 21:28A false witness shall perish: but the man that heareth speaketh constantly.
Acts 12:15And they said unto her, Thou art mad. But she constantly affirmed that it was even so. Then said they, It is his angel.
Titus 3:8This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men.