This is the 2393rd most frequent Russian word.
отбора
"Отбора" means "selection" or "screening" in English.
The word "отбора" refers to the process of selection or choosing.
Процесс отбора студентов в университет был строгим.
The selection process for students to enter the university was strict.
Here, "отбора" is used to describe the act of filtering or choosing participants.
Футбольная команда провела несколько дней для отбора лучших игроков.
The football team spent several days selecting the best players.
In this sentence, "отбора" is used to denote the action of selecting or filtering a specific quality in a system.