Feature Frequency

How often a slot's main feature, such as free spins, is triggered on average, usually stated as roughly one in so many spins.

Definition

Feature frequency describes the average rate at which a game's bonus feature is entered, often expressed as something like once every few hundred spins. It is a long-run average produced by the random number generator, so the actual gap between features varies widely and a feature can be missed for far longer, or hit sooner, than the average. Feature frequency is closely tied to volatility: games that pay most of their return through rare features tend to trigger them less often. It is a useful expectation-setting figure but never a promise about any individual session.

Worked example

A slot advertises a free-spins feature that triggers on average about once every 250 spins. In practice you might hit it twice within a hundred spins or not at all across five hundred, because the average smooths over huge short-term swings.

Why it matters

For a learner, feature frequency sets a realistic expectation of how rarely bonuses arrive and why droughts are normal. For a professional, it is a headline math statistic that shapes player perception and is balanced against feature richness and volatility.

Related

Note: Quoted feature frequencies are long-run averages that vary by title and are not experienced evenly in a session.