This is the 102nd most frequent Russian word.
течение
The Russian word "течение" means "current," "flow," or "course" in English, depending on context.
Refers to the physical flow of water in a river or stream.
Течение реки было быстрым.
The current of the river was swift.
Indicates a period of time over which something happens, functioning as a preposition.
В течение недели он прочитал три книги.
During the week, he read three books.
Means a tendency or trend, referring to a shift or new style in a field like art or thought.