'Months' in the Bible

She said to her father, "Let this thing be done for me: let me alone two months, that I may depart and go down on the mountains, and bewail my virginity, I and my companions."

He said, "Go." He sent her away for two months: and she departed, she and her companions, and mourned her virginity on the mountains.

It happened at the end of two months, that she returned to her father, who did with her according to his vow which he had vowed: and she was a virgin. It was a custom in Israel,

His concubine played the prostitute against him, and went away from him to her father's house to Bethlehem Judah, and was there the space of four months.

But six hundred men turned and fled toward the wilderness to the rock of Rimmon, and stayed in the rock of Rimmon four months.