He said the operation could take between 48 hours and several weeks.

She is not certain how many more operations that will take.

The whole operation had taken no more than a few minutes.

These operations take place several times a day around the city, throughout the year.

The whole operation had taken on the nature of a race.

The whole operation should not take more than a week.

He was new on the Force when the operation took place.

He was not certain how long the operation would take.

The operation takes only a few minutes for each eye.

The operation on one eye takes about 10 to 15 minutes.