This is the 183rd most frequent Ukrainian word.
минулого
"Минулого" means "of the past" or "last" in English.
Here, 'минулого' functions as an adverb modifying the noun 'тижня' (week), indicating the time frame in the past.
Минулого тижня ми відвідали музей.
Last week, we visited a museum.
In this case, 'минулого' is used with the genitive case of 'рік' (year) to describe the time frame related to the events.
Події минулого року залишили значні враження.
The events of last year left a significant impression.
Here, 'минулого' functions as a noun in the genitive case referring to 'past,' denoting a generalized previous time period.