This is the 5049th most frequent Russian word.
методов
"Методов" means "methods" in English.
Here, "методов" is used as the genitive plural form of "метод" (method) to describe the specific kinds of analysis employed.
В исследовании применялось несколько методов анализа данных.
In the research, several methods of data analysis were applied.
The word "методов" again appears in the genitive plural, specifying types of methods whose effectiveness is being discussed.
Эффективность различных методов была проанализирована учёными.
The effectiveness of different methods was analyzed by scientists.
Here, "методов" in the genitive plural form emphasizes the variety of methods combined for problem-solving.