The phrase "a host of trials" is correct and usable in written English.
It can be used to describe a large number of challenges or difficulties someone is facing.
Example: "Throughout her career, she faced a host of trials that tested her resilience and determination."
Alternatives: "a multitude of challenges" or "a series of difficulties".
Ava is currently running a host of clinical trials not only to extend the kind of help it can offer other categories of women who want to get pregnant — for example those with pre-existing complications, and those who have been trying for more than a year — but also women who might not want to get pregnant at all.
In fact, unemployment has been correlated to a host of severe personal trials, from depression to declining health to divorce.
Since that time, authors and headline writers have claimed this title for a host of other crimes (and trials) — think of Leopold and Loeb, Sacco and Vanzetti, the Scottsboro boys, the Lindbergh baby kidnapper, Alger Hiss, Julius and Ethel Rosenberg, Lee Harvey Oswald, James Earl Ray, the Manson family, the Watergate crowd and O. J. Simpson.
If, for example, British personnel are again seized by the Iranian authorities, the Foreign Office needs to be thoroughly apprised of detention conditions, the risk of torture, the fairness of trials and a host of other human rights issues.
Perhaps not surprisingly, operators are trialling a host of new technologies designed to make us spend.
He is likely to represent himself in the trial, the first public figure to do so in the host of trials of politicians since Mubarak's fall, Brotherhood lawyers have said.
YCAAD has been involved in a host of both industry and investigator sponsored trials.
Until recently, no treatment had been shown to have lasting effectiveness in controlled clinical trials, despite a host of remedies variously endorsed by hearing specialists and commercial interests.
Early trials suggest a host of allergies and autoimmune diseases could be treated by swallowing parasitic worms, or by faecal transplants that re-introduce beneficial microbes back into the gut.
