This is the 545th most frequent Czech word.
třech
The word "třech" is the locative or genitive plural form of "three" in Czech, meaning "of three" or "in three."
The word 'třech' is used to denote 'three' in the locative case, referring to the span of three days.
Ve třech dnech jsme navštívili tři země.
In three days, we visited three countries.
Here, 'třech' is in the genitive plural, indicating a duration involving three months.
Během třech měsíců tam bydlela.
She lived there for three months.
In this case, 'třech' represents the genitive plural, used to describe a relationship of participation involving three races.