This is the 15226th most frequent Russian word.
популярностью
"Popularity."
The word 'популярностью' is used in the instrumental case here to indicate the tool or quality by which the film is known or characterized.
Этот фильм пользуется большой популярностью среди молодежи.
This movie enjoys great popularity among the youth.
Here, 'популярностью' again appears in the instrumental case reflecting the attribute describing the acceptance or recognition within the scientific community.
Её новая книга обрела широкую популярностью в научной среде.
Her new book has gained wide popularity in the scientific community.
In this statement, 'популярностью' is used metaphorically in the instrumental case to represent the notable interest or prevalence of the topic among researchers.