not once
Definitions
At no time; never.
On zero occasions.
Examples
Not once did he apologize for his rude behavior during the meeting.
She has visited the city many times, but not once has she seen the famous cathedral.
At no time; never.
On zero occasions.
Not once did he apologize for his rude behavior during the meeting.
She has visited the city many times, but not once has she seen the famous cathedral.