The phrase "a toppling of" is correct and usable in written English.
It can be used to describe the act of causing something to fall or collapse, often in a metaphorical sense, such as a regime or an established order.
Example: "The revolution led to a toppling of the long-standing government, resulting in significant changes to the political landscape."
Alternatives: "a fall of" or "a collapse of".
One book foretells a war with Japan in 2014, another a toppling of the current leadership that same year.
People have been calling for a toppling of the sectarian regime since 2011, and teachers' unions have continued to struggle for a wage increase.
The government consultant told me that the hawks in the Pentagon, in private discussions, have been urging a limited attack on Iran because they believe it could lead to a toppling of the religious leadership.
As everyone knows, the winter of 1989-90 haseenen the birth in Central and Eastern Europe of a new collective noun - "a toppling of tyrants". In earlier times, tyrants, if toppled at all, were toppled one by one.
They await a collapse of their empire – expecting, either during a hurricane or Occupy Wall Street, a toppling of the social order – but somehow the moment never seems to arrive.
Its primary purpose, according to regulators, was to forestall a toppling of financial dominoes on Wall Street, in the event that Bear Stearns skidded into bankruptcy and other firms began falling apart as well.
"If you look at history, leverage is often a toppler of robust markets; it magnifies the upside and the downside," said Steven Galbraith, an analyst at Sanford C. Bernstein & Company.
ONE of the prime minister's aides greets visitors to his office by pointing at a toppling pile of paperwork consisting of draft legislation, regulations and directives.
Then, a progressive toppling of a rock mass may have led to the catastrophic rock collapse along bedding planes.
By 1989, that dissident had successfully led the Velvet Revolution, a peaceful toppling of the Czech communist government, and became the president of a democratic Czechoslovakia.
It clearly cries out for a great toppling of dominoes.
