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то и дело stresses
gen.	time and time again; ever and again; repeatedly (A.Rezvov); statedly; constantly; now and anon (VLZ_58); now and then; again and again; time and again; ever and anon; every now and again; every now and then; often (suburbian); over and over again; every foot and anon
Игорь Миг	from time to time (В нервном гуле автомобильного потока то и дело слышались хлопки (Over the excited buzz of traffic you could hear pops from time to time (Michele Berdy)); routinely; more often than not
context.	be littered with (The last time I travelled to Najaf, the road was littered with burned-out American vehicles, smashed police vehicles, abandoned checkpoints and armed men. 4uzhoj)
dial., amer.	at every whipstitch
euph.	perpetually (Anglophile)
Gruzovik, idiom.	every once in a while; continually
inf.	now and again; oftentimes (You know, lawyers oftentimes get criticized about the justice system Val_Ships); incessantly; every so often
Makarov., amer., dial.	at every whipstitch
proverb	now and again (used as adv. mod. of manner; with imp. v.)

то и дело: 66 phrases in 7 subjects

Criminal law	1
General	40
Informal	4
Makarov	15
Nonstandard	2
Obsolete / dated	1
Slang	3