qualifier token a chosen word

billing interval

The cadence unit on which a recurring price bills — day, week, month, quarter, or year. A qualifier of `recurring_price` (cardinality one per plan), combined with `interval_count` to express 'every 3 months'. A governed token, growing (L13).

Billing interval is answered with one word chosen from the billing intervals list — the same word shared across every product that uses it.

It is a qualifier of recurring price — it has meaning only inside a recurring price statement, one per statement, never on its own. It belongs with recurring price to subscription & financing — one facet of a product.

It is answered inside every recurring price statement, not as a standalone question on a kind.

answered with: ◇token — a token — a word chosen from a fixed vocabulary, shared and filterable across products.
value domain: Billing Intervals — the vocabulary its answers are drawn from.
qualifier of: recurring price — one per statement — it has meaning only inside that host's statement.

Answered inside every recurring price statement — not a standalone slot on any kind.