This is the 5081st most frequent Polish word.
prezydentów
"Prezydentów" is the genitive plural form of "prezydent," meaning "presidents'" (possessive case).
This usage of "prezydentów" is in its plural genitive form, indicating "of presidents" in the context of several famous individuals referred in plural.
W historii Europy było wielu znanych prezydentów.
In the history of Europe, there have been many famous presidents.
Here, "prezydentów" is used in the plural genitive form to express possession about the elections related to several presidents.
Polacy często rozmawiają o wyborach przyszłych prezydentów.
Poles often talk about the elections of future presidents.
"Prezydentów" in this sentence is in the plural genitive form, referring to both presidents together in a possessive expression regarding their histories.