This is the 16293rd most frequent Russian word.
регионов
"Regions."
In this sentence, 'регионов' is the word in genitive plural form used to specify the focus of funding, i.e., particular regions.
Правительство планирует увеличить финансирование отдельных регионов.
The government plans to increase funding for certain regions.
Here, 'регионов' indicates ownership, pointing to the 'parts' that belong to 'regions'.
Климат в некоторых частях этих регионов может быть суровым.
The climate in some parts of these regions can be harsh.
In this example, 'регионов' is used to describe the geographical distribution (different regions of a location).