'Days' in the Bible

Now after the death of Saul, when David, having come back from the destruction of the Amalekites, had been in Ziklag for two days;

And when the days of weeping were past, David sent for her, and took her into his house, and she became his wife and gave him a son. But the Lord was not pleased with the thing David had done.

In those days the opinions of Ahithophel were valued as highly as if through him a man might get direction from God; so were they valued by David as much as by Absalom.

Then the king said to Amasa, Get all the men of Judah together, and in three days be here yourself.

Then she said, In the old days, there was a saying, Let them put the question in Abel and in Dan, saying, Has what was ordered by men of good faith in Israel ever come to an end?

In the days of David they were short of food for three years, year after year; and David went before the Lord for directions. And the Lord said, On Saul and on his family there is blood, because he put the Gibeonites to death.

And he gave them up to the Gibeonites, and they put them to death, hanging them on the mountain before the Lord; all seven came to their end together in the first days of the grain-cutting, at the start of the cutting of the barley.

So after going through all the land in every direction, they came to Jerusalem at the end of nine months and twenty days.

So Gad came to David, and gave him word of this and said to him, Are there to be three years when there is not enough food in your land? or will you go in flight from your haters for three months, while they go after you? or will you have three days of violent disease in your land? take thought and say what answer I am to give to him who sent me.

So David made selection of the disease; and the time was the days of the grain-cutting, when the disease came among the people, causing the death of seventy thousand men from Dan as far as Beer-sheba.