The phrase "a very long process of" is correct and usable in written English.
It can be used to describe an extended duration or complexity of a particular procedure or activity.
Example: "The project involved a very long process of planning and execution before we could see any results."
Alternatives: "an extensive process of" or "a lengthy process of".
"Change is a very long process of mental revolution," she says.
He said Mr. Geithner faced "a very long process of winning back credibility" with the public after the tax controversy.
Rejecting supernatural explanations, the evolutionists see man's development as the product of a very long process of human genes interplaying with the environment.
Well, in all it took five years to make Skyward Sword and at the beginning of the development cycle there was a very long process of sorting out the basics of the game.
"We worked up a proposal for education studies and then began a very long process of getting it approved," says Merseth, who started teaching United States in the World 35: Dilemmas of Equity and Excellence in American K 12 Education, in the fall of 2011 — at the time, the only education class for undergraduates.
Maxim Thorne, a former high-ranking official with the organization, said that "for certain people, it was a very long evolution and a very long process of reconciling their faith with this, and coming to a very civil rights understanding of marriage equality versus a theological understanding of marriage".
"This was a very long process, and a lot of people participated," Bacon said.
The costume's then put together and then it goes back to the painters to do all the embellishment and the lines and everything on top, so it was a very long process and took a lot of people.
This is a very long process, it takes a lot of effort.
"This is act one, scene one of a very long process and what I have got to do now is have a lot of talks with people here in Uxbridge and South Ruislip, get to know people, get to know the association better," he added.
