uses units of 86400s (1 day) with a slop of 8640
it keeps 14 daily items
(that is 14 items, dated no less than 86400-8640 apart)
- and 7 weekly items
- (that is 7 items, dated no less than 7*86400-8640 apart)
+ and 4 weekly items
+ (that is 4 items, dated no less than 7*86400-8640 apart)
the 14 daily and 7 weekly items may be the same, or not
There is no need to sort the list of <number>x<interval> pairs.
exit status: