This is the 12020th most frequent German word.
tschechiens
"Tschechiens" is the genitive case of "Tschechien," meaning "of Czechia" or "of the Czech Republic" in English.
In this sentence, 'Tschechiens' is used as the possessive form (genitive case) of 'Tschechien', indicating ownership, referring to the capital of the Czech Republic.
Die Hauptstadt Tschechiens ist Prag.
The capital of the Czech Republic is Prague.
Here, 'Tschechiens' again appears in the genitive case, denoting that the growing economy belongs to Tschechien, illustrating possession in an abstract sense.
Die Wirtschaft Tschechiens wächst stetig.
The economy of the Czech Republic is steadily growing.
This sentence uses 'Tschechiens' similarly in the genitive case to indicate that the history belongs to Tschechien, continuing the possessive theme.