The phrase "a fleeting hour" is correct and usable in written English.
It can be used to describe a short or transient period of time, often evoking a sense of nostalgia or urgency.
Example: "As I sat by the window, I realized that a fleeting hour had passed, and I had lost myself in thought."
Alternatives: "a brief moment" or "a passing hour".
If a young couple wanted to burrow deep inside a place where they could sip pisco sours and feel, for a fleeting hour or two, like a polo player and a South American heiress having an assignation in 1974, they might very well sit in such a spot.
And for a fleeting hour of the night, I felt a little more comfortable and a little less sweaty.
Beginning around midnight and lasting for a few fleeting hours, the official temperature of Manhattan dropped to 1 degree.
For a few fleeting hours last month, Bret D. Schundler thought he had the Republican nomination for governor of New Jersey locked up.
This is the season when the Met is transformed for a few fleeting hours into MTV Pop House, the televised backdrop for the music industry aristocracy's annual video awards.
Expect Mr. Jasperse's beautifully architectural deployment of articulate movement and a deeply human encounter with dancers who have a career's worth of experience to show you in one fleeting hour.
The school's hymn went, "Men of the future stand / And watch each fleeting hour / To make your lives what God has planned, / To spread abroad his power.
He arrived in New Jersey with a pair of cleats and a small bag of belongings, half expecting a fleeting, 24-hour stay.
During a fleeting 12-hour visit, the prime minister and Owen met troops separated from their families at Christmas on a dusty makeshift football pitch at Camp Bastion, the British base at Helmand.
Tarun Tejpal, who was the magazine's managing editor then, wrote in that special issue, "Indians are lucky that a short, gifted man can, with a few swishes of his wand, take away the cares and drudgery of their lives and transport them to a 22-yard pleasure palace where the onslaught of disease and the price of onions is for fleeting hours no more real than a distant mirage".
To hear oral arguments and the handing down of decisions, citizens and countless school groups line up outside the Supreme Court building, completed in 1935, for a chance to experience the court in action for two fleeting hours.
