Tracking when headers are printed

Hello,

I am interested in tracking how often a header we recently put into use is being printed, but I've not been able to find what table this data lives in. I've been looking through the Tessitura Table Structure document and having a look through the database as well. I feel like this is a bit of a nuanced request so if you have done this before it would be great to hear from you.

Many thanks,
Will