Historical clue formulations

• Without cost: Ger. — 2015-08-18
• Independent, in Ingolstadt — 2010-08-17
• Costing nothing, in Cologne — 2010-03-01
• Having no cost, in Cologne — 2007-10-14
• Chilean president, 1964-70 — 1998-05-03
• At liberty, in Munich — 1994-10-22