This is the 627th most frequent Ukrainian word.
тижні
Weeks.
Here, 'тижні' is used in the nominative plural form to denote a specific group of weeks.
Ці тижні були дуже продуктивними для нашої команди.
These weeks have been very productive for our team.
In this sentence, 'тижнів' is in the genitive plural form, used to indicate a quantity of weeks.
За кілька тижнів ми плануємо почати новий проект.
In a few weeks, we plan to start a new project.
Here, 'тижнів' is in the genitive plural form, showing duration or a period of time.