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скоротечность n stresses
gen.	brevity (Andrey Truhachev); rapidity (Andrey Truhachev)
скоротёчность n
gen.	transience; rapidity; short duration; transiency; fleetness (времени); fugitiveness; shortness; transitoriness
mil.	fluidity
mil., arm.veh.	fluidity (боя)
obs.	transientness
скоротЕчность n
gen.	impermanence (Aly19)
Gruzovik	transiency; rapidity; short duration

скоротёчность: 7 phrases in 5 subjects

Automated equipment	1
General	3
Idiomatic	1
Makarov	1
Military	1