'Chance' in the Bible

And the young man that told him said, As I happened by chance upon mount Gilboa, behold, Saul leaned upon his spear; and, lo, the chariots and horsemen followed hard after him.

Then the people of Israel answered the men of Judah and said, "I have {ten times as much} in the king, moreover in David I have more than you. Why did you treat me with contempt {by not giving me first chance} to bring back my king?" But the words of the men of Judah [were] fiercer than the word of the men of Israel.

Now by chance there was present a good-for-nothing person named Sheba, the son of Bichri, a Benjamite: and he, sounding the horn, said, We have no part in David, or any interest in the son of Jesse: let every man go to his tent, O Israel.