"peaked out" is correct and usable in written English.
It is an idiom which means "to reach the highest point or level," and it is usually used in the past tense. For example, "This year's stock market performance peaked out last month."
A few faces peaked out from an doorway in the distance, but no weapon was discernible.
Goldman added a complicated white necklace, whose details peaked out from the top of the shirt.
"It is not clear whether it has peaked out," said Saturo Shinzuka, golf course analyst for Teikoku Databank, a private credit research firm that tracks bankruptcies in Japan.
— Six white balloons and 19 purple balloons floated into the gray sky, up to the wisp of blue that peaked out above the steeple.
"Every time that profits growth has peaked out, people say it doesn't matter, and every time the Fed has started raising rates people say it doesn't matter," Mr. Bernstein said.
Uncle Joe's disembodied head peaked out from the snow and Lenin reached out to a long-gone crowd - I was surprised Lithuanians didn't take the opportunity to lob some well-aimed snowballs.
In contrast to the peaked out-degree distribution of random Boolean networks, large-scale biological networks have long-tailed out-degree distributions [ 53, 54].
"Maybe I peaked the first time out," he said in 1997.
If Tiger is this good at 21, what will he be like at 35, the age when golfers usually peak As it turns out, he peaked a little younger than 35.
At times, one artist's career is clearly on the rise while the other's has peaked, a scenario played out in the film A Star Is Born.
"DJ Got Us Fallin' in Love" remained on the Hot 100 for thirty weeks before dropping out, and peaked at number four, becoming Usher's sixteenth top-ten hit.
