'Fiftieth' in the Bible

You shall make the fiftieth year holy, and proclaim liberty throughout the land to all its inhabitants. It shall be a jubilee to you; and each of you shall return to his own property, and each of you shall return to his family.

That fiftieth year shall be a jubilee to you. In it you shall not sow, neither reap that which grows of itself, nor gather from the undressed vines.

In the fiftieth year of Azariah king of Judah Pekahiah the son of Menahem began to reign over Israel in Samaria, [and reigned] two years.

In the two and fiftieth year of Azariah king of Judah Pekah the son of Remaliah began to reign over Israel in Samaria, [and reigned] twenty years.