I think that's a fair way to do it, count both. Insoluble fber passes through our guts essentailly unchanges...think sawdust
, celery strands, poppy seeds, corn coverings, and the like...pretty much made of mainly cellulose. They contribute to fecal mass but not a huge amount.
Then there's the soluble fibers like pectins, psyllium, methylcellulose (manmade) that suck up increasing amountd of mosisture depending on type. Psyllium is a good one because if you've ever walked away from a glass of juice with some psyllium husks in it you come back in 5 minutes and find the whole works gelled.
Some of the soluble fibers are quite similar to the insolubles and it's best to view the whole thing as a spectrum from insoluble to very soluble and just consider them all good.
Yeah, I'd count your 9Tbsp. intake as near 50g. fiber also.