This is the 17552nd most frequent Russian word.
трех
"Трёх" means "of three" in English.
Used to denote the numeral "three" in the nominative case.
У нас есть три разных плана.
We have three different plans.
Used to denote the genitive case form of "three" as "трех," referring to the duration of three days.
Мы решили встретиться в течение трех дней.
We decided to meet within three days.
Used to express the genitive case involved in possession or association with "three students."