Below is the index with the user freshness values and the time since the subscription that they relate to.
​
0=Unknown

1=0-1 hours
2=1-2 hours
3=2-6 hours
4=6-12 hours
5=12 hours - 1 day
6=1-2 days
7=2-7 days
8=7-14 days
9=14-21 days
10=21-30 days
11=30-45 days
12=45-60 days
13=+60 days