once or twice
A small, indefinite number of times.
Have you changed a tyre before? — Yes, once or twice.
ADJ.
large, live, long, many, over, same, same
She visited her grandmother twice a week for many years.
VERB + TWICE
brush, caught, costs, gone, held, issued, meeting, meets
I brush my teeth twice a day to keep them healthy.
TWICE + NOUN
day, days, month, person, row, week
I go to the gym twice a week to stay fit and healthy.
PREP.
about, about, in, than
She earns twice as much money as her brother does.
ADV.
nearly, often
I've been to that restaurant nearly twice a month for the last year.