'Peradventure' in the Bible

peradventure there are fifty righteous in the midst of the city; dost Thou also consume, and not bear with the place for the sake of the fifty -- the righteous who are in its midst?

peradventure there are lacking five of the fifty righteous -- dost Thou destroy for five the whole of the city?' and He saith, 'I destroy it not, if I find there forty and five.'

And he addeth again to speak unto Him and saith, 'Peradventure there are found there forty?' and He saith, 'I do it not, because of the forty.'

And he saith, 'Let it not be, I Pray thee, displeasing to the Lord, and I speak: peradventure there are found there thirty?' and He saith, 'I do it not, if I find there thirty.'

And he saith, 'Lo, I pray thee, I have willed to speak unto the Lord: peradventure there are found there twenty?' and He saith, 'I do not destroy it, because of the twenty.'

And he saith, 'Let it not be, I pray Thee, displeasing to the Lord, and I speak only this time: peradventure there are found there ten?' and He saith, 'I do not destroy it, because of the ten.'

And the brethren of Joseph see that their father is dead, and say, 'Peradventure Joseph doth hate us, and doth certainly return to us all the evil which we did with him.'