The phrase "in a shake" is correct and can be used in written English.
It generally means "very quickly" or "in an instant". For example, you could say: "I fixed the broken window in a shake."
A three-storey infilled RC structure was subjected to a sequence of ten incremental earthquakes in a shake table test.
But obviously it should all end in a shake of the hand".
I had, weirdly enough, some mashed sweet potato and protein in a shake.
Significant medium components for xylanase production were optimized using a statistical method, Central Composite Design (CCD) in a shake flask culture.
The optimal medium for butyric acid production by Clostridium thermobutyricum in a shake flask culture was studied using statistical experimental design and analysis.
The respiration-engineered B. subtilis produced 6.15 g/L GlcNAc in a shake flask and 20.58 g/L GlcNAc in a 3-L fed-batch bioreactor.
Defence Secretary Philip Hammond announced the number of troops in Wiltshire would be increased by about 3,000 in a shake-up of army bases.
Mr. Hoover was reassigned in October in a shake-up prompted by questions about the operation.
Mr. Capeci became the design director at Entertainment Weekly in 2009, after Newsweek let him go in a shake-up.
He became Coca-Cola's president and chief operating officer in 2000 but left in March 2001 in a shake-up.
In a shake-up at Scientific American, the longtime editor John Rennie and the magazine's president, Steven Yee, are leaving.
