The phrase "a group at a time" is correct and usable in written English.
It can be used when referring to a process or action that is done in increments, specifically focusing on one group during each iteration.
Example: "We will conduct the interviews in batches, bringing in a group at a time to ensure a smooth process."
Alternatives: "one group at once" or "one group at a go".
The investigators can delete events (e.g. if an entity was created by mistake and then deleted), annotate events or groups of events if they feel that the system-generated description is not sufficient, and move events up and down in order to match a time line of real events (e.g., people join a group at a different time from the investigation finding their group membership).
Join a group at tea time playing a musical trivia game.
If an interaction between 2 factors in a group at 1 time point was significant in the repeated MANOVA, a simple main effect test of the group difference at the same time point was applied.
The move was opposed by music teachers--an important group at a time when pianos were more common than phonographs.
" Judge Williams was a founding member of the John M. Langston Bar Association, a black lawyers' group, at a time when blacks were not allowed to join the Los Angeles County Bar Association.
Mr. Burt, a former marine, acknowledged that he had been a member of the group at a time when he was a "drinker and doper" but said he had abandoned the group's racist doctrine when he became a born-again Christian.
At 14, he hooked up with a DJ named Boogie and they started a rap group at a time when London was thriving with a healthy hip-hop scene fostering acts such as the Demon Boyz, Rebel MC and London Posse.
It would be a strategic conquest for the group at a time when opponents hoped US-led air strikes and Kurdish and army operations were slowing its advance across Iraq and Syria.
A former New York City school superintendent has filed a federal lawsuit accusing former Chancellor Rudy Crew of firing him because he is white and because the chancellor needed a scapegoat to appease Mayor Rudolph W. Giuliani and a powerful business group at a time when the school system was under fire for low test scores.
Mr. Gore, who announced his health care plan last year, would expand existing government programs, mostly the Children's Health Insurance Program, to cover the most vulnerable uninsured, one group at a time, with a goal of ensuring that all children would have access to affordable coverage by 2005.
