The word гћд 'year' has two Genitive Plural forms: годћв and лљт. With numerals (greater than four) and quantity words, only the form лљт is used.
Скћлько вђм лљт? How old are you?
мнћго лљт many years
пїть (шљсть, двђдцать пїть, etc.) лљт five (six, twenty-five, etc.) years
The Genitive Sg. form гћда is used with the numerals двђ, трќ, and четІре.