"long long before" is a correct and usable phrase in written English.
You can use it to denote a very distant point in time in the past, such as: "Long long before modern technology was invented, people relied on manual labor to get things done."
The grief overwhelms his premiership to such an extent that the diaries' editors believe it was partly responsible for his departure from Downing Street".When a government falls in one week! or should I say five days, you may be quite sure its overthrow has been planned long, long before," writes Margot on her last morning in Downing Street.
Maybe because Tibetans are all reincarnations of those with this tradition long, long before?
"For instance, dukes were known to marry chorus girls long, long before anything like that.
"It was over, that was all, and long, long before they were ready, though not before they expected".
Mr. McLaren saw the big cultural picture of which fashion was a part, and he sensed the small vibrations long, long before they reached the mainstream.
By the time Randall set off, the ball was in Thommo's hands and, long, long before he could reach the other end, Rod Marsh had the bails off.
Let's begin our journey to a time long, long ago, before blogs, before MySpace, when zines told the world, "This is me, world!
A long, long time before the evolution of humankind, and long before even that of ants.
Despite the evidence before my eyes, it will be a long, long time before my mind will register that it is gone.
"I was going a lot faster than Heikki and then a long, long way before the braking point he braked — about 80 meters before, and at that point I'm a passenger," Webber said.
"If not, it will be a long long time before we win anything else".
