The expression "distinct phase" is correct and usable in written English.
It can be used to describe a particular period of time during which something happened or changed. For example, "We are currently in a distinct phase of technological progress, where people freely access knowledge from all around the world."
A distinct phase of controversy began in 1991 with the appearance of Oliver Stone's film JFK.
Noting that medieval artists depicted children as adults, only smaller, he argued that early modern parents had little conception of childhood as a distinct phase of life.
The sheer scale of the task convinced me that it would have to be a trilogy, with each novel covering a distinct phase of Cicero's life and so capable of being read as a standalone story.
Symeon's mystical theology is a distinct phase of an evolutionary process in Greek spirituality that began in the late 2nd century.
At the same time, the emerging child-study movement and the new specialty of pediatrics helped popularize the idea that childhood was a distinct phase of life and that adolescents, in particular, moved through discrete developmental stages, which adults had a duty to try and understand.
Ms. Gillibrand's efforts represent a distinct phase in her own political evolution since 2009, when David A. Paterson, then the governor, appointed her to the Senate seat vacated by Mrs. Clinton, who left to become secretary of state.
The term Shōwa literature, however, does denote a distinct phase in Japanese literature from about 1924 until the outbreak of World War II in 1939, and the Great Depression of the 1930s, which was particularly severe in Japan, is referred to as the Shōwa Depression there.
Different doping sites have distinct phase transition behavior.
Several proposals treat admission control as distinct phase and assume availability of free resources.
There was a distinct phase interface between the aqueous and kerosene.
Engineering line diagram (ELD) development forms a distinct phase in process plant design.
