"long attempt" is correct and can be used in written English when referring to an extended period of time spent trying to do something.
For example: "He made a long attempt to complete the difficult puzzle."
Exact(22)
This is the vexing lesson of Fountain's long attempt to get noticed by the literary world.
After three timeouts, Northwestern got a long attempt from Drew Crawford that hit the backboard as time expired.
Colonel Qaddafi's long attempt to eliminate the government left Libya in shambles, its sagging infrastructure belying its oil wealth.
The Polish government's long attempt to sell the "G8" cluster of power distributors in central and northern Poland is not one of them.
But even Wenger knows that his long attempt to win Europe's most coveted trophy in his 16th season with Arsenal is dead and buried.
American goalkeeper Hope Solo, who had little to do, jumped to push Hwang Boram's long attempt over the crossbar in the 54th.
Similar(38)
It was a night indicative of Collins's season-long attempt to find a strong lineup.
But his month-long attempt to broker an inclusive government failed.
The move continues a season-long attempt to improve a bullpen that was the worst in baseball in 2010.
EUROPE'S year-long attempt to grapple with the sovereign-debt crisis is becoming more nailbiting by the day.
What sparked the new talks was progress in the Indians' decades-long attempt to win federal recognition.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com