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одним росчерком пера stresses
gen.	with one stroke of the pen; by a dash of the pen; by one dash of the pen; with a stroke of the pen; with a scratch of the pen (Anglophile); at a stroke of the pen (Anglophile)
Gruzovik	with the stroke of the pen
Игорь Миг	at the drop of the hat
idiom.	with a dash of the pen (george serebryakov)
rhetor.	with the stroke of a pen (theguardian.com Alex_Odeychuk)

одним росчерком пера: 4 phrases in 2 subjects

General	2
Idiomatic	2