The phrase "a phenomenal increase" is correct and usable in written English.
It can be used to describe a significant or remarkable rise in quantity, value, or degree of something.
Example: "The company reported a phenomenal increase in sales this quarter, surpassing all previous records."
Alternatives: "an extraordinary rise" or "a remarkable growth".
A phenomenal increase in fracture toughness (∼118%) was observed in TWC pellet compared to TiC.
Immigration to the U.S. has experienced a phenomenal increase in the last decades.
For instance, over the past year, the number of Nepalese students studying in the US has shown a phenomenal increase of 18%.
"It only accounts for about 2percentt of the site's sales for the period, but that's a phenomenal increase from before," Ms. Miller said.
Meanwhile, changes in society above all, a rising divorce rate, a phenomenal increase in the number of working mothers, the takeover of the home by television have created a world that is basically inimical to children.
The increase in research output, particularly in East Asian countries, reflects a "phenomenal" increase in funding, said Simon Marginson, a professor of higher education at the University of Melbourne.
Despite his long name, World Cup winner Bastian Schweinsteiger moved up 27 places in the rankings and saw a phenomenal 795 per cent increase in sales of his shirt.
And in Asia, gold ETFs rose by 21 metric tons, or $862 million, a phenomenal 20percentt increase from the previous month.
According to the Institute for Economics and Peace in London, there has been a phenomenal 80percentt increase in terrorist incidents last year.
As for recruiting students, admissions officers talk with awe about "the Flutie spike": the phenomenal increase in applications at Boston College in the mid-1980's tied to the heart-stopping performances of a quarterback named Doug Flutie.
But few could have imagined the phenomenal increase in Manhattan property values that would take place in the 47 years after the 34th Street lease was signed.
