This is the 327th most frequent Russian word.
месяца
The Russian word "месяца" means "of the month" or "months" (genitive singular or nominative/accusative plural of "месяц").
"Месяца" indicates the plural genitive case used to show the duration or quantity of months.
Мне понадобилось два месяца для завершения проекта.
I needed two months to complete the project.
"Месяца" is in the singular genitive case, used due to its connection to the preposition "с" indicating the starting point.
С начала месяца мы наблюдали значительный прогресс.
Since the beginning of the month, we have observed significant progress.
"Месяца" is used in plural genitive to indicate the time frame following "через".