How to get number of buried cards for the day?

Anki Add-ons
1

Hi,

I am the author of Review Statistics During Review (Cards done, Left, s/card, spent, left, ETA) - AnkiWeb

I’d like to update the total by subtracting the number of buried cards as seen after the plus signs in this picture:

image
image1540×886 74 KB

How does one do that?

2

If you look at the source code of that screen, you’ll see they are derived by comparing the due values from the deck list.

3

Would you know how to call for that in an addon? I’d like to subtract the plus values from my addon’s total cards left value.