This is the 1924th most frequent Polish word.
wojciecha
"Wojciecha" is the feminine form of the Polish name "Wojciech," meaning "joyful warrior."
Here 'Wojciecha' is the genitive form of the proper noun 'Wojciech', showing possession or relationship.
Kupuję książkę o życiu Wojciecha.
I am buying a book about Wojciech's life.
Here 'Wojciecha' is the accusative form of the proper noun 'Wojciech', used as the direct object of the verb 'saw'.
Widziałam Wojciecha na rynku wczoraj.
I saw Wojciech at the market yesterday.
Here 'Wojciecha' is again in the genitive case, indicating the source or origin of the help that is needed.