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| Russian | English |
| за короткий период времени | within a short span of time (One curious aspect of the UFO phenomenon is how many sightings seem to come in waves, with many witnesses coming forward in the same area within a short span of time, for whatever reasons. (mysteriousuniverse.org) ART Vancouver) |
| за сравнительно короткий период времени | within a relatively short period of time (If the petroglyphs were made within a relatively short period of time, they may tell a story, said James Dodd, a researcher at Aarhus University in Denmark and the Tanums Hällristningsmuseum's Rock Art Research Centre Underslös in Sweden.  livescience.com ART Vancouver) |