The phrase "a notable expansion" is correct and usable in written English.
It can be used to describe a significant increase or growth in a particular area, such as business, knowledge, or territory.
Example: "The company reported a notable expansion in its market share over the last quarter."
Alternatives: "a significant increase" or "a remarkable growth".
The country was plagued by social problems, including a notable expansion of organized crime, while living standards continued to fall, albeit less catastrophically than in recent years.
He was elected governor of South Carolina in 1946 and proceeded to initiate several liberal reforms, including a notable expansion of the state educational system.
The university underwent a notable expansion following the Russian Revolution, and it maintained its preeminent role in mathematics, physics, chemistry, mechanics, astronomy, and other disciplines during the Soviet period.
Under the loosely centralized feudal government of the Sāmānids, Transoxania and Khorāsān prospered, with a notable expansion of industry and commerce, attested by the use of Sāmānid silver coins as currency throughout northern Asia.
The move is a notable expansion of Messenger ad tests in Australia and Thailand in January.
That's a notable expansion for the startup, which currently has offices in San Fransisco, New York and Turkey, and soon, Asia, as the Chinese app stores combined with other Android app markets are now delivering more revenue potential than Apple's App Store alone.
This is a pretty notable expansion for Instagram in growing its desktop presence, especially while other mobile-first apps like Snapchat have shown little interest in expanding their online interfaces for desktop users.
Good generalship and the soldiers' loyalty and resilience, as well as excellent artillery and cavalry, made for a formidable military force that achieved the notable expansion of the empire during the 18th century.
Apart from regular movements, recent years have seen a notable range expansion by the cattle egret from Africa and Asia to the Americas and to Australia.
The Axiata deal is a notable regional expansion for FreedomPop, tapping into much-coveted, fast-growing, populous emerging market economies.
This is a notable market expansion: Deliv says that is now covers a footprint the same size as Prime Now, the same-day delivery service that Amazon provides to its Prime subscribers, one of the bigger selling points for people signing on to Prime and buying from Amazon.
