This is the 339th most frequent Czech word.
česka
The Czech word "češka" (note the correct spelling) translates to "Czech woman" in English.
Here, 'česká' is used as an adjective in its feminine form, modifying the noun 'dívka' (girl). It denotes her nationality or origin.
Česká dívka šla do školy.
The Czech girl went to school.
In this context, 'česka' refers to a regional flatbread and is in its noun form. It is used to describe a specific food item.
Na stole ležela česka od krajánka.
On the table lay a Czech tortilla from the traveler.
Here, 'Češkou' is a declined form of the feminine noun 'Češka', referring to a Czech woman, and it is in the instrumental case.