This is the 3789th most frequent Polish word.
niemców
The word "niemców" is the genitive and accusative plural form of "Niemcy," meaning "Germans" in English.
Here, 'Niemców' is used as the accusative form of the noun 'Niemcy,' referring to Germans in a general sense.
Niektórzy Niemców kojarzą z ich słynną precyzją.
Some people associate Germans with their famous precision.
'Niemców' in this context is used as the genitive plural to indicate possession or association.
Opowiedziano mi wiele historii o Niemcach i Niemców ich dotyczących.
I was told many stories about Germans and concerning Germans.
Here, 'Niemców' is in the accusative case to indicate the object of the verb 'przyjechała' (arrived).