This is the 13883rd most frequent Russian word.
обменов
"Обменов" means "exchanges" (plural form).
In this sentence, "обменов" refers to events of exchanging books.
В библиотеке проводятся акции обменов книгами.
The library hosts book exchange events.
Here, "обменов" is used to describe transactions or exchanges of data.
Количество обменов данными на сервере увеличилось.
The number of data exchanges on the server has increased.
In this case, "обменов" refers to discussions or exchanges of ideas or opinions.