Prompt volume
An estimate of how often a tracked question is asked, used to weight some questions more heavily than others.
Nobody publishes assistant query volumes, so any figure here is a proxy, usually the search volume of a related keyword. Treating it as a measurement rather than a proxy is a mistake worth avoiding.
The honest use is relative weighting: a question tied to a high-demand topic should count for more than one tied to nothing, without letting the highest-volume term dominate everything. A log scale does that, which is why a 10,000-a-month question weighs roughly four times a zero-volume one rather than ten thousand times.
Watch for the same volume repeated across many prompts. Expanded conversational prompts usually inherit their seed keyword's figure, so summing them across a topic double-counts the same demand.