People are confused as to how to sit shiva and how to properly pay a shiva call. Because people do not know, and because talking about death makes people nervous and awkward, the shiva house often turns into a festive gathering filled with nervous chatter, instead of the proper house of mourning.
The average number of days in a month is around 30.4. With 24 hours in a day, this is an average of about 730 hours per month.
If your goal is to average 20 minutes a day, it's the 14th day of the month, and your average so far is 16 minutes a day, you know you're going to have to work harder and more regularly for the rest of the month if you want to get the average number up to 20 by the time it ends.