The phrase "a particularly difficult period" is correct and usable in written English.
You can use it to describe a time frame that was especially challenging or tough, often in a personal, professional, or historical context.
Example: "During the pandemic, many people experienced a particularly difficult period in their lives, facing isolation and uncertainty."
Alternatives: "an especially challenging time" or "a notably tough phase."
The first postwar decade was a particularly difficult period of repression and Russification.
Michael Spurr, chief executive officer of the National Offender Management Service, said the inspectors had visited the prison during a particularly difficult period.
It aggravates the vulnerability of women and girls who are just coming out of a particularly difficult period in their lives because of Ebola.
They date from the mid-1970s through 2004 — a time of reinvention for Wu (1919-2010), whose midcareer years coincided with a particularly difficult period for Chinese artists.
In 1996, during a particularly difficult period in his life, he, too, joined a Pentecostal church, the Redeemed Christian Church, one of Nigeria's largest, with branches in Africa and America.
Joaquín Almunia, the E.U. competition commissioner, said the airlines had colluded over surcharges for fuel and security during a particularly difficult period for the industry after the terror attacks on the United States on Sept. 11, 2001.
"We really want to provide our customers with certainty during this particularly difficult period for the rail industry.
Mind you, what helped Jack get through this particularly difficult period was -- just as 30 Rock was winding down -- McBrayer was out promoting "Wreck-It Ralph," that Academy Award-nominated Walt DiStudiosimation Studios production which was just released on Blu-ray & DVD this Tuesday.
"We are coming out of a particularly difficult winter period which saw all trusts across the country struggle for beds," said Deirdre Thompson, director of nursing at the trust.
Humanitarian organizations have a particularly difficult time adapting to transitional periods.
