qualifier number + unit a measured amount

trial length

The duration of a free trial that precedes the first charge on a recurring price — a numeral with a time unit (typically days; reuses TimeUnits). A qualifier of `recurring_price` (cardinality one). Its presence IS the 'has a trial' fact (a separate has-trial existence token would be derivable, A10); its absence means no trial. The actual trial end-date is realised downstream (L1).

Trial length is a measured figure, given in seconds or minutes.

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: №number + unit — a number paired with a unit drawn from an exhaustive unit vocabulary.
value domain: Time units — 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.