This is the 6247th most frequent Swedish word.
körberg
"Körberg" is not a Swedish word; it may be a proper noun, such as a surname.
Here, 'Körberg' is used as a proper noun referencing the surname of a person and subject of the sentence.
Körberg sjöng med kraft i gårdagens konsert.
Körberg sang with power at yesterday's concert.
In this sentence, 'Körberg's' is the possessive form of the proper noun, indicating the talents of the same person.
Jag har alltid beundrat Körbergs förmåga att uttrycka känslor genom musik.
I have always admired Körberg's ability to express emotions through music.
Here, 'Körberg' again serves as a proper noun referring to the person's participation in a performance.