'Days' in the Bible

And it came to pass after the death of Saul, when David was returned from the slaughter of the Amalekites, and David had abode two days in Ziklag;

When thy days are fulfilled, and thou shalt sleep with thy fathers, I will set up thy seed after thee, that shall proceed out of thy bowels, and I will establish his kingdom.

And the counsel of Ahithophel, which he gave in those days, was as if a man inquired at the oracle of God: so was all the counsel of Ahithophel both with David and with Absalom.

And Barzillai said unto the king, How many are the days of the years of my life, that I should go up with the king unto Jerusalem?

Then said the king to Amasa, Call me the men of Judah together within three days, and be thou here present.

And there was a famine in the days of David three years, year after year; and David sought the face of Jehovah. And Jehovah said, It is for Saul, and for his bloody house, because he put to death the Gibeonites.

And he delivered them into the hands of the Gibeonites, and they hanged them in the mountain before Jehovah, and they fell all'seven together. And they were put to death in the days of harvest, in the first days, at the beginning of barley harvest.

So when they had gone to and from through all the land, they came to Jerusalem at the end of nine months and twenty days.

So Gad came to David, and told him, and said unto him, Shall seven years of famine come unto thee in thy land? or wilt thou flee three months before thy foes while they pursue thee? or shall there be three days pestilence in thy land? now advise thee, and consider what answer I shall return to him that sent me.