This is the 11963rd most frequent Polish word.
kwater
The Polish word "kwater" does not exist; you might mean "kwatera," which means "quarters," "accommodation," or "lodging."
Here, 'kwaterach' pertains to military or official quarters assigned to individuals.
Żołnierze zostali rozlokowani w kwaterach przygotowanych przez lokalne władze.
The soldiers were stationed in quarters arranged by local authorities.
In this sentence, 'kwaterę' refers to a form of accommodation or lodging for temporary stay.
Wynajęliśmy kwaterę w górach na weekend.
We rented a lodging in the mountains for the weekend.
In this occurrence, 'kwaterze głównej' refers to a main office or headquarters, often central to certain organizations or activities.