'Months' in the Bible

She said to her father, “Let this thing be done for me; let me alone two months, that I may go to the mountains and weep because of my virginity, I and my companions.”

Then he said, “Go.” So he sent her away for two months; and she left with her companions, and wept on the mountains because of her virginity.

At the end of two months she returned to her father, who did to her according to the vow which he had made; and she had no relations with a man. Thus it became a custom in Israel,

But his concubine played the harlot against him, and she went away from him to her father’s house in Bethlehem in Judah, and was there for a period of four months.

But 600 men turned and fled toward the wilderness to the rock of Rimmon, and they remained at the rock of Rimmon four months.