A "common phrase" refers to a group of words commonly used by many people to express something. It is a familiar saying that people understand and use often. Full definition
One of the most common phrases used by owners to describe a dog that appears stressed when the owner leaves home — or just leaves the room — is separation anxiety in dogs. (cesarsway.com)
This should be a mixture of hard and soft skills and should pull from common phrases in jobs you're targeting. (resume-now.com)
The most common phrase out of too many authors is: I can't market my books. (thebookshepherd.com)