This is the 879th most frequent Russian word.
врачей
The genitive plural of "врач," meaning "doctors."
In this sentence, "врачей" is the genitive plural form of "врач", used to indicate possession or quantity.
У нас в городе много хороших врачей.
In our city, there are many good doctors.
Here, "врачей" is also in the genitive plural form, showing association or relation.
Мы побывали на конференции врачей вчера.
We attended the doctors' conference yesterday.
In this example, "врачей" is the genitive plural form, indicating absence or lack.