"wave of accusations" is correct and can be used in written English.
You could use it to refer to a large number of accusations against someone or something, for example: "The mayor has faced a wave of accusations regarding his handling of the scandal."
The recent wave of accusations may seem overwhelmingly unbelievable.
That kicked off a wave of accusations, allegations, criticism".
A recent wave of accusations against public school employees for inappropriate behavior brings to light the city's difficulty in firing tenured teachers.
But a new wave of accusations reaching ever closer to Rome has emerged in recent weeks, helped along, in part, by Mr. Anderson's discovery of previously undisclosed documents.
In response to the wave of accusations of anti-semitism, Trump didn't apologize or attempt to put the event behind him.
The wave of accusations came in the wake of the release of a 2005 video showing Trump boasting that he forced himself on women and grabbed their genitals.
As the party's internal electoral commission counted and recounted the votes during the day, appeals for calm were drowned out by waves of accusation and counter-accusation.
The case involves the only criminal proceedings against Cosby, 78, to emerge from a tidal wave of similar accusations.
Gen. Charles H. Gerhardt, commander of the infantry division that landed at Omaha Beach, partly to counter a wave of rape accusations against G.I.'s.
The United States media should not become the conduit for the systematic disinformation campaign against Iran reflected in a new wave of baseless accusations about Iranian weapons inside Iraq.
That Mr. Cain has come as far as he has, only to be knocked around in recent weeks by a wave of personal accusations and embarrassing policy moments, tells you a lot about the craving for genuine outsiders in our politics — and why they so rarely succeed.
