What is this marketing term?

Okay, there’s one term, “Sales penetration”, that means: “Extent to which total market potential has been realised, i.e. the proportion of people in that market who have become users or consumers of a product or service.”

and there’s another term that means, the extent to which a given user is bought in to the product.

“A consumer who buys 5 flibble bobbles per week has a higher level of ________ than a consumer who buys only 2”

What is that gosh danged word that goes in the blank?? I can’t think of it, and no (in advance), this isn’t a question on my homework.

Please, no guesses. It’s a real term, and you either know what it is or you don’t.

Thanks in advance!