This is the 3766th most frequent Russian word.
чемпионов
"Of champions" (genitive plural form of чемпион).
The word 'чемпионов' is used in the genitive plural form to describe belonging or association to champions.
Книга посвящена достижениям великих чемпионов.
The book is dedicated to the achievements of great champions.
Here, 'чемпионов' signifies the genitive plural form to illustrate possession, indicating that the award belongs to the champions.
В музее выставлена награда чемпионов прошлого века.
In the museum, an award of the champions of the past century is displayed.
In this context, 'чемпионов' in the genitive plural form is used to illustrate that experience is gained from these champions.