It's a daily measurement of how many days I have been DBing and not getting into any heated, angry arguments with the wife.
So when I start journaling by saying "Day 74/155", I'm implying that I have not pursued/argued/etc. and actively DBing for 74 days. The 155 days is what I deduced from my DB coach to be the number of days I have been doing things that is considered DBing (the GAL portion primarily. I made a lot of other mistakes in that time, begging, crying, snooping and getting caught, yelling, angry, etc.).
It also helps the reader decide if I have been DBing for 74 days or 155. So when I come here to complain/be grateful you can decide to tell me "Pain, it has been only three months. This takes time! Chill the crap out!" or "Pain, it's been five months and you are deep in DBing! Keep up the work!"