at the same time
adverb
- simultaneously, concurrently
Wiktionary
prep_phrase
- At the same instant.
“Their departures were at the same time.”
“They departed at the same time.”
- Overlapping or coinciding in duration.
“I'm working. But at the same time, I'm exercising too.”
“His service as chairman was at the same time as his board membership”
- On the other hand (introducing an opposing viewpoint).