11.   The study found that all doctors went through a comparable learning period.

12.   There was no comparison number for the comparable period a year earlier.

13.   About two-thirds of the garages that invested in the new equipment are doing more tests than they did during a comparable period last year, he said.

14.   Arison said cruise pricing has largely recovered from the significantly discounted levels last fall, now running only slightly below the comparable period last year.

15.   But at no comparable period in peacetime history has the United States leaned more heavily or frequently on its armed forces for such missions as peacekeeping and drug intervention.

16.   Recovery crews searching through the last mountains of World Trade Center debris have found more human remains in the past three weeks than in any comparable period since October.

17.   Recovery workers searching through the last mountains of debris have found more human remains in the last three weeks than in any comparable period since October.

18.   This was twice as much as any previous fall over a comparable period since the war.