21.   Some creative statisticians have worked it down to calculations of the number of hours per week and minutes per day.

22.   So, I wonder whether he knows many children in our public schools never get a total of an hour per year of individualized instruction from their teachers.

23.   Take a moment to consider all the tasks you are expected to do and how many hours per week you are supposed to work.

24.   The chief executive of Airbus, Noel Forgeard, insisted that these measures did not include layoffs, but instead reduced the number of man hours per year.

25.   The disc holds an hour per side at its low-quality setting, but that is too low to bother with.

26.   The NCAA also has passed rules requiring a minimum number of hours per semester and proof that students are progressing toward a degree.

27.   The next step is learning to lip-synch, which takes several hours per song.

28.   The turtle moved so slowly it was going hours per mile instead of miles per hour.

29.   The World Health Organization once surveyed Canadian children and found that, outside school, the girls were active only half an hour per week or less.

30.   They said they have been permitted to visit him a half hour per week across prison bars.