It depends on the DVR company. I believe that Knowlegy and Midcontinent can hold 80 hours and I think Dish can hold over 200 hours. I'm not sure about the other ones. You could go to there sights to find out.
2 hours
1h to 2.25 hours depending on quality.
There have been millions of hours of television shows broadcasted since the first television show was aired. People can watch a variety of shows 24 hours a day.
2 shows/hr times 33hrs. = 66 shows (no commercials!)
Shows have been taped during the Summer to be shown it the fall, but they are not recorded a set amount in the future like your question suggests. Location shows have been done many months before all of the episodes have aired, yet some shows air less than a month after being recorded
Eye tissue is stored for no more than seven days.
According to variety, there are 564 award shows a year. 1.5 award shows a day. They give out 4025 trophies. 1 every 2 hours
The Comcast DVR can hold about 400 hours of SD programming.
It has a stored memory,not on time just on space available.
180 minutes ... or 3 hours. However in today's standards of television shows constantly interrupting the commercials, it's hard to tell anymore. :)
h/120
there are 74 minutes stored on a CD