The phrase "a steady expansion" is correct and usable in written English.
It can be used to describe a consistent and gradual increase in size, quantity, or scope over time.
Example: "The company has experienced a steady expansion in its market share over the past few years."
Alternatives: "a gradual growth" or "a continuous increase".
But since then, a steady expansion brought that number back above 190,000 by late summer.
Although the century witnessed a steady expansion of scientific knowledge, the curriculum of the established universities went virtually untouched.
Microfluidics have seen a steady expansion of the operation toolbox over the last decade, which includes membrane separations as well.
In 1981 a cover story on ice cream in Time Magazine added momentum to what had been a steady expansion of their wholesale operation.
The hotel opened last week, the latest in a steady expansion programme since Mama Shelter launched its first hotel in Paris eight years ago.
Demographic maps of the Middle East since 1948, the year Israel was founded, show a steady expansion of the Jewish population eastwards.
C4, by contrast shows a steadier expansion from the early 1990s, peaking around 2004 with a decline in the early part of the present decade, coincident with the second expansion of B5.
Mr. Bush urged a broad, steady expansion of NATO into countries of Eastern Europe that are not in the alliance.
On the day before his first meeting with President Vladimir V. Putin of Russia, Mr. Bush used a speech in the capital of this former Soviet bloc country to urge a broad, steady expansion of NATO into the countries of Eastern Europe that are not now in the alliance.
After taking over in 2010, she embarked on a slow, steady expansion across the West, opening more than 80 stores in the same period that Five Guys, a close competitor, added more than 500 across America.
Across the region, Orange County, the first Southern California economy to return to positive economic growth in 2010, will lead the transition from recovery to a slow, steady expansion, fostered by its universities, high-tech industries and tourist attractions, the report said.
