в течение vs на протяжении
v techenie vs na protyazhenii — during/within vs throughout/over
Register: neutral / formal
What it really means
В течение places an event within a time span or says it lasts for that span; it takes the genitive. На протяжении likewise takes the genitive and emphasizes continuity across the whole period, often with repeated conditions or actions. Both are written separately, and течение ends in -ие in this preposition.
Examples in natural speech
В течение недели я работал дома.
I worked from home during the week.
Ответ пришёл в течение часа.
The reply arrived within an hour.
На протяжении года цены росли.
Prices rose throughout the year.
На протяжении всей встречи он молчал.
He was silent throughout the meeting.
В течение трёх дней шёл дождь.
It rained for three days.
Common mistakes
Use genitive: в течение месяца, на протяжении лет. Do not write в течении when meaning “during”; «в течении реки» is instead literal “in the flow/current of the river.”
Memory tip
Течение is a bounded span; протяжении stretches a thread from beginning to end.
Frequently asked questions
Are the two phrases interchangeable?
Often, but на протяжении more strongly highlights uninterrupted duration or coverage of the whole period.
Why does течение sometimes end in -и?
The noun «течение» changes case: «в течении реки» is locative/prepositional after в, unlike the time preposition «в течение».
Can в течение mean “within a deadline”?
Yes: «в течение двух дней» can mean at some point within two days or lasting two days, depending on the verb.
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