Once or twice

Pro Tip 1/3

Not regularly

Used when an action is done infrequently, emphasizing it's not a habit or common occurrence.

I go to the cinema once or twice a year.

Pro Tip 2/3

Conversation Softener

It downplays frequency to seem modest or casual, often when you're more familiar than you want to admit.

I've met him once or twice, though we've actually had many meetings.

Pro Tip 3/3

Potential Understatement

The phrase may be an understatement, especially in modest or polite contexts.

I've read his work once or twice.