The phrase "a string of frustrations" is correct and usable in written English.
It can be used to describe a series of ongoing difficulties or annoyances that someone has experienced.
Example: "After dealing with a string of frustrations at work, I decided to take a break and reassess my priorities."
Alternatives: "a series of setbacks" or "a chain of disappointments".
For many users of Facebook, the world's largest social network, it was just the latest in a string of frustrations.
After a string of frustrations, the company simplified its privacy settings in an effort to make the controls easier to navigate.
Despite a promising four-game stretch in mid-April in which he hit three of his four home runs, the past three weeks have unfurled as a string of frustrations, punctuated with flipped bats and slammed helmets.
The attacks come as rebels who have been fighting to oust President Charles G. Taylor and have twice attacked the city in the last six weeks face a string of frustrations.
THE INTELLIGENCE COMMUNITY -- The successful operation ended a string of failures and frustrations for American agencies.
Nobody would know how to deal with such a string of tragedies and frustrations in real life, but realism is not what this movie is about.
Mexico's governing party has suffered a major defeat in local elections in what looks like a backlash against a string of corruption scandals, frustration at continued violence, and concern about the country's plodding economy.
The successful introduction of the euro, a monumental logistical and technical task in its own right, gave way to a string of all-too-national frustrations for Mr. Trichet and his colleagues.
Just six years out of college, Chazelle had written the film — a blistering tale of a young drummer (Miles Teller) under the tutelage of a cruel, manipulative music teacher (J.K. Simmons) — in a sort of fever of frustration after a string of earlier aborted scripts had gone nowhere.
Then a string of Republicans rose to express frustration with the economy, and in some cases irritation with Mr. Bush's long vacation in Texas.
A string of disputes with Mr. Marinan and frustrations over his minor role at City Hall led the young councilman to decide he would not run for re-election.
